IAPMO USHGC 2018
$35.75
Uniform Solar, Hydronics and Geothermal Code
| Published By | Publication Date | Number of Pages |
| IAPMO | 2018 | 127 |
The Uniform Solar, Hydronics and Geothermal Code is a model code developed by IAPMO to govern the installation and inspection of solar hydronic, and geothermal energy systems as a means of promoting the public’s health, safety and welfare. Published previously as the Uniform Solar Energy Code, the 2018 edition adds significant provisions concerning hydronic and geothermal systems. USHGC was developed using the American National Standards Institute (ANSI)-accredited open consensus process
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | Preface |
| 4 | Important Notices and Disclaimers Updating IAPMO Codes |
| 5 | Foreword Origin and Development |
| 6 | Adoption Revision Markings |
| 7 | Format of the Uniform Solar, Hydronics and Geothermal Code |
| 10 | Sample Legislation for Adoption of the Uniform Solar, Hydronics and Geothermal Code |
| 12 | Committee on Uniform Solar, Hydronics and Geothermal Code |
| 13 | Section Relocation |
| 16 | Table of Contents Chapter 1 Administration Chapter 2 Definitions Chapter 3 General Regulations |
| 18 | Chapter 4 Hydronics |
| 19 | Chapter 5 Solar Thermal Systems |
| 20 | Chapter 6 Thermal Storage Chapter 7 Geothermal Energy Systems |
| 21 | Chapter 8 Solar Photovoltaic Systems |
| 23 | Chapter 9 Referenced Standards Appendices Table of Contents Appendix A Engineered Solar Energy Systems Appendix B Solar Photovoltaic System Installation Guidelines Appendix C Supplemental Checklist for Solar Photovoltaic Systems Useful Tables Index |
| 24 | Chapter 1 Administration 101.0 General. 101.1 Title. 101.2 Scope. 101.3 Purpose. 101.4 Unconstitutional. 101.5 Validity. 102.0 Applicability. 102.1 Conflicts Between Codes. 102.2 Existing Installation. 102.3 Maintenance. 102.4 Additions, Alterations, Renovations, or Repairs. 102.5 Health and Safety. 102.6 Changes in Building Occupancy. 102.7 Moved Structures. 102.8 Appendices. 103.0 Duties and Powers of the Authority Having Jurisdiction. 103.1 General. TABLE |
| 25 | 103.2 Liability. 103.3 Applications and Permits. 103.3.1 Licensing. 103.4 Right of Entry. 104.0 Permits. 104.1 Permits Required. 104.2 Exempt Work. 104.3 Application for Permit. 104.3.1 Construction Documents. 104.3.2 Plan Review Fees. |
| 26 | 104.3.3 Time Limitation of Application. 104.4 Permit Issuance. 104.4.1 Approved Plans or Construction Documents. 104.4.2 Validity of Permit. 104.4.3 Expiration. 104.4.4 Extensions. 104.4.5 Suspension and Revocation. 104.4.6 Retention of Plans. 104.5 Fees. 104.5.1 Work Commencing Before Permit Issuance. |
| 27 | 104.5.2 Investigation Fees. 104.5.3 Fee Refunds. 105.0 Inspections and Testing. 105.1 General. 105.2 Required Inspection. 105.2.1 Uncovering. 105.2.2 Other Inspections. 105.2.3 Inspection Requests. 105.2.4 Advance Notice. 105.2.5 Responsibility. 105.2.6 Reinspections. |
| 28 | 105.3 Testing of Systems. 105.3.1 Defective Systems. 105.3.2 Retesting. 105.3.3 Approval. 105.4 Connection to Service Utilities. 106.0 Violations and Penalties. 106.1 General. 106.2 Notices of Correction or Violation. 106.3 Penalties. 106.4 Stop Orders. 106.5 Authority to Disconnect Utilities in Emergencies. 106.6 Authority to Condemn. 107.0 Board of Appeals. 107.1 General. 107.2 Limitations of Authority. |
| 29 | Table 104.5 System Permit Fees |
| 30 | Chapter 2 Definitions 201.0 General. 201.1 Applicability. 202.0 Definition of Terms. 202.1 General. 202.2 Terms Defined in Other Documents. 203.0 – A – 204.0 – B – |
| 31 | 205.0 – C – 206.0 – D – |
| 32 | 207.0 – E – 208.0 – F – |
| 33 | 209.0 – G – 210.0 – H – |
| 34 | 211.0 – I – 212.0 – J – 213.0 – K – 214.0 – L – |
| 35 | 215.0 – M – 216.0 – N – 217.0 – O – 218.0 – P – |
| 36 | 219.0 – Q – 220.0 – R – 221.0 – S – |
| 37 | 222.0 – T – 223.0 – U – 224.0 – V – 225.0 – W – 226.0 – X – 227.0 – Y – 228.0 – Z – |
| 38 | Chapter 3 General Regulations 301.0 General. 301.1 Applicability. 302.0 Standards and Alternates. 302.1 Minimum Standards. 302.1.1 Marking. 302.1.2 Standards. 302.1.3 Existing Buildings. 302.2 Alternate Materials and Methods of Construction Equivalency. 302.2.1 Testing. 302.2.1.1 Tests. 302.2.1.2 Request by Authority Having Jurisdiction. 302.3 Flood Hazard Areas. TABLES |
| 39 | 302.3.1 Coastal High Hazard Areas. 302.3.2 Flood Resistant Materials. 302.4 Alternative Engineered Design. 302.4.1 Permit Application. 302.4.2 Technical Data. 302.4.3 Design Documents. 302.4.4 Design Approval. 302.4.5 Design Review. 302.4.6 Inspection and Testing. 303.0 Iron Pipe Size (IPS) Pipe. 303.1 General. 304.0 Accessibility for Service. 304.1 General. 304.2 Access to Appliances on Roofs. 304.2.1 Access. 304.2.2 Access Type. 304.2.3 Permanent Ladders. |
| 40 | 304.2.4 Permanent Lighting. 304.2.5 Sloped Roof. 304.3 Appliances in Attics and Under-Floor Spaces. 304.3.1 Length of Passageway. 304.3.2 Width of Passageway. 304.3.3 Work Platform. 304.3.4 Lighting and Convenience Outlet. 304.4 Appliances on Roofs. 304.4.1 Load Capacity. 304.4.2 Fasteners. 304.4.3 Installation of Appliances on Roofs. 304.4.4 Clearance. 304.4.5 Electrical Power. 304.4.6 Platform or Walkway. 305.0 Installation. 305.1 Listed Appliances. 305.2 Dissimilar Metals. 305.3 Direction of Flow. 305.4 Changes in Direction. |
| 41 | 305.5 Improper Location. 305.6 Insulation. 305.7 Drainage Pan. 305.8 Anchorage. 305.9 Structural Design Loads. 305.10 Location. 305.11 Ownership. 306.0 Workmanship. 306.1 Engineering Practices. 306.2 Concealing Imperfections. 306.3 Burred Ends. 306.4 Installation Practices. 306.4.1 On-Site. 307.0 Labeling. 307.1 Fuel-Burning Appliances. 307.2 Electric Heating Appliances. 307.3 Heat Pump and Electric Cooling Appliances. |
| 42 | 307.4 Absorption Units. 308.0 Condensate Wastes and Control. 308.1 Condensate Disposal. 308.1.1 Condensate Pumps. 308.2 Condensate Control. 308.2.1 Protection of Appurtenances. 308.3 Condensate Waste Pipe Material and Sizing. Table 308.3 Minimum Condensate Pipe Size |
| 43 | 308.3.1 Cleanouts. 308.4 Appliance Condensate Drains. 308.5 Point of Discharge. 308.6 Condensate Waste from Air-Conditioning Coils. 308.7 Plastic Fittings. 309.0 Safety Requirements. 309.1 Welding. 309.2 Spark or Flame. 309.3 Hazardous Heat-Transfer Mediums. 309.4 Discharge. 310.0 Circulators and Pumps. 310.1 General. 310.2 Mounting. 310.3 Sizing. 310.4 Drainback Systems. 310.5 Pumps Used in Parallel. 310.6 Cavitation. 310.7 Materials. 310.8 Operation. 311.0 Safety Devices. 311.1 General. |
| 44 | 311.2 Pressurized Vessels. 311.3 Discharge Piping. 311.4 Vacuum Relief Valves. 311.5 Temperature Regulation. 312.0 Valves. 312.1 General. 312.2 Where Required. 312.3 Heat Exchanger. 312.4 Pressure Vessels. 312.5 Pressure Reducing Valves. 312.6 Equipment, Components, and Appliances. 312.7 Expansion Tanks. 312.8 Flow Balancing Valves. 312.8.1 Location. 312.9 Control Valves. 312.9.1 Mixing or Temperature Control Valves. 312.10 Thermosiphoning. 312.11 Air Removal Device or Air Vents. 312.12 Closed Loop Systems. 312.13 Fullway Valves. 312.14 Accessible. 313.0 Heat Exchangers. 313.1 General. |
| 45 | 314.0 Unlawful Connections. 314.1 Prohibited Installation. 315.0 Electrical. 315.1 Wiring. 315.2 Controls. 315.3 Solar Photovoltaic (PV) Systems. 315.3.1 Fire Code. 315.3.2 Building Code. 316.0 Disposal of Liquid Waste. 316.1 General. 316.2 Connections to Drainage System Required. 316.3 Drainage. 316.4 Nonpotable Discharge. 317.0 Hangers and Supports. 317.1 General. 317.2 Material. 317.3 Suspended Piping. 317.4 Alignment. 317.5 Underground Installation. 317.6 Hanger Rod Sizes. 317.7 Strength. 318.0 Protection of Piping, Materials, and Structures. 318.1 General. Table 317.6 Hanger Rod Sizes |
| 46 | 318.2 Installation. 318.3 Fire-Resistant Construction. 318.4 Waterproofing of Openings. 318.5 Steel Nail Plates. 318.6 Sleeves. Table 317.3 Hangers and Supports |
| 47 | 318.6.1 Building Loads. 318.6.2 Exterior Walls. 318.7 Firewalls. 318.8 Structural Members. 318.9 Rodentproofing. 318.10 Metal Collars. 319.0 Protection of System Components. 319.1 Materials. 319.2 Corrosion. 319.3 Mechanical Damage. 320.0 Trenching, Excavation, and Backfill. 320.1 Trenches. 320.2 Tunneling and Driving. 320.3 Open Trenches. 320.4 Excavations. 321.0 Abandonment. 321.1 General. 321.2 Storage Tank. 322.0 Other Systems. 322.1 General. 322.2 Duct Systems. |
| 48 | Chapter 4 Hydronics 401.0 General. 401.1 Applicability. 401.2 Insulation. 401.3 Water Hammer Protection. 401.4 Manifolds. 401.5 Heat Emitters. 401.6 Mechanical Devices. 401.7 Flexible Connectors. 401.8 Freeze Protection. 402.0 Protection of Potable Water Supply. 402.1 Prohibited Sources. 402.2 Protection of Potable Water. 402.3 Compatibility. 403.0 Capacity of Heat Source. 403.1 Heat Source. 403.2 Dual Purpose Water Heater. 403.3 Tankless Water Heater. 404.0 Identification of Piping Systems. 404.1 General. 404.2 Color and Information. 404.3 Potable Water. TABLES Table 403.2 Water Heaters |
| 49 | 404.4 Nonpotable Water. 404.5 Location of Piping Identification. 404.6 Flow Directions. 404.7 Heat Transfer Fluid. 405.0 Installation, Testing, and Inspection. 405.1 Operating Instructions. 405.2 Pressure Testing. 405.3 Flushing. 405.4 Oxygen Diffusion Corrosion. 406.0 Heating Appliances and Equipment. 406.1 General. 406.2 Boilers. 406.2.1 Condensing Boilers. 406.2.2 Noncondensing Boilers. 406.3 Dual-Purpose Water Heaters. 406.3.1 Temperature Limitations. 406.4 Solar Heat Collector Systems. 407.0 Expansion Tanks. 407.1 General. Table 404.3 Minimum Length of Color Field and Size of Letters |
| 50 | 407.2 Installation. 407.3 Closed-Type Expansion Tanks. 407.4 Open-Type Expansion Tanks. 408.0 Materials. 408.1 Pipe, Tube, Tubing, and Fittings. 408.2 Expansion and Contraction. 408.3 Hangers and Supports. 409.0 Joints and Connections. 409.1 General. 409.2 Chlorinated Polyvinyl Chloride (CPVC) Pipe. 409.3 CPVC/AL/CPVC Plastic Pipe and Joints. |
| 51 | 409.4 Copper or Copper Alloy Pipe and Tubing. Table 408.1 Materials for Hydronics and Solar Thermal System, Piping, Tubing, and Fittings |
| 52 | 409.5 Cross-Linked Polyethylene (PEX) Pipe. 409.6 Cross-Linked Polyethylene/Aluminum/Cross-Linked Polyethylene (PEX-AL-PEX) Pipe. 409.7 Polyethylene (PE) Plastic Pipe/Tubing. |
| 53 | 409.8 Polyethylene/Aluminum/Polyethylene (PE-ALPE). 409.9 Polyethylene of Raised Temperature (PE-RT). 409.10 Polypropylene (PP) Pipe. 409.11 Polyvinyl Chloride (PVC) Pipe. 409.12 Steel Pipe and Tubing. |
| 54 | 409.13 Joints Between Different Materials. 409.13.1 Copper or Copper Alloy Pipe or Tubing to Threaded Pipe Joints. 409.13.2 Plastic Pipe to Other Materials. 410.0 System Controls. 410.1 Water Temperature Controls. 410.2 Operating Steam Controls. 410.2.1 Water-Level Controls. 410.3 Occupied Spaces. 410.4 Return-Water Low-Temperature Protection. 410.5 Simultaneous Operation. 410.6 Temperature Reading. 411.0 Pressure and Flow Controls. 411.1 Balancing. 411.2 Low-Water Control. 411.3 Flow-Sensing Devices. 411.4 Automatic Makeup Fluid. 411.5 Differential Pressure Regulation. 411.5.1 Differential Pressure Bypass Valve. |
| 55 | 411.6 Air-Removal Device. 411.7 Air-Separation Device. 411.8 Secondary Loops. 412.0 Hydronic Space Heating. 412.1 General. 412.2 Installation. 412.3 Balancing. 412.4 Heat Transfer Fluid. 413.0 Steam Systems. 413.1 Steam Traps. 413.2 Sloping for Two-Pipe System. 413.3 Sloping for One-Pipe System. 413.4 Automatic Air Vents. 413.5 Condensate Flow. 413.6 Steam-Distribution Piping. 414.0 Radiant Heating and Cooling. 414.1 Installation. 414.2 Radiant Floor Heating. 414.3 Radiant Cooling Systems. 414.4 Tube Placement. |
| 56 | 414.5 Poured Floor Structural Concrete Slab Systems. 414.5.1 Slab Penetration Tube and Joint Protection. 414.5.2 Insulation. 414.5.3 Types of Tube Fasteners. 414.5.4 Spacing of Tube Fasteners. 414.6 Joist Systems and Subfloors. 414.7 Wall and Ceiling Panels. 414.8 Tubing Fasteners. Table 414.4 Maximum Loop Lengths of Continuous Tubing for Radiant Systems |
| 57 | 414.9 Radiant Heating and Cooling Panels. 414.9.1 Radiant Wall and Ceiling Panels. 415.0 Indirect-Fired Domestic Hot-Water StorageTanks. 415.1 General. 416.0 Snow and Ice Melt Systems. 416.1 Snow and Ice Melt Controls. 416.1.1 Tube Placement. 416.1.2 Poured Structural Concrete Slab Systems. 416.1.3 Slab Penetration Tube and Joint Protection. 416.1.4 Insulation. 416.1.5 Testing and Flushing. Table 416.1.1 Maximum Loop Lengths for Snow and Ice Melt Systems |
| 58 | 416.2 Types of Tube Fasteners. 416.3 Spacing of Tube Fasteners. 417.0 Piping Installation. 417.1 General. 417.2 Embedded Piping Materials and Joints. 417.2.1 Steel Pipe. 417.2.2 Copper Tubing. 417.2.3 Plastics. 417.3 Pressure Testing. 417.4 System Drainage. 417.5 Clearance to Combustibles. |
| 60 | Chapter 5 Solar Thermal Systems 501.0 General. 501.1 Applicability. 501.2 Connections. 501.3 Stagnation Condition. 501.4 Draining. 501.5 Materials. 501.5.1 Plastic. 501.5.2 Combustible Materials. 501.5.3 Adhesives. 501.5.4 Potable Water. 501.5.5 Racks. 501.5.6 Fasteners. 501.6 Thermosiphon Systems. 501.7 Drainback Systems. 501.8 Auxiliary Heating. 501.9 Automatic Air Vents. 501.10 Waterproofing. 501.11 Protection. 501.12 Freeze Protection. 501.12.1 Antifreeze. 501.12.2 Drainback. 501.12.3 Integral Collector Storage. 501.12.4 Indirect Thermosiphon. 501.12.5 Air Heating Systems. TABLES |
| 61 | 501.12.6 Labeling. 501.12.7 Piping. 501.13 Circulators. 501.14 Protection Against Decay. 501.15 Flash Points. 501.16 Storage Tanks. 502.0 Solar Collectors. 502.1 General. 502.1.1 Construction. 502.2 Fire Safety Requirements. 502.3 Flat Plate Collector Glass. 502.4 Air Collectors. 502.4.1 Testing. 502.5 Installation. 502.5.1 Roof Installations. 502.5.2 Above or on the Roof. 502.5.3 Ground Installations. 502.5.4 Wall Mounted. 502.5.5 Access. 502.5.6 Orientation. 502.6 Listing. |
| 62 | 503.0 Insulation. 503.1 General. 503.2 Heat Loss. 503.3 Piping. 503.4 Fittings. 503.5 Installation. 503.5.1 Exterior Applications. 503.6 Ducts. 504.0 Testing. 504.1 Piping. 504.2 System Requirements. 504.2.1 Direct (Open Loop) Systems. 504.2.2 Indirect (Closed Loop) Systems. 505.0 Swimming Pools, Spas, and Hot Tubs. 505.1 Water Chemistry. 505.2 Parameters. Table 503.3(1) Minimum Pipe Insulation |
| 63 | 505.3 Filter. 505.3.1 Location. 505.4 Corrosion Resistant. Table 505.2 Water Chemistry |
| 64 | Table 503.3(2) Iron Pipe and Copper Tubing Insulation Thickness |
| 65 | Table 503.3(3) Universal Pipe Insulation Thickness Based on Radius and Iron Pipe Size (IPS) |
| 66 | Table 503.3(4) Design Values for Thermal Conductivity (k) of Industrial Insulation |
| 67 | Table 503.6 Insulation of Ducts |
| 68 | Chapter 6 Thermal Storage 601.0 General. 601.1 Applicability. 601.2 Test Pressure for Storage Tanks. 601.2.1 Pressure Type. 601.2.2 Atmospheric-Type. 601.3 Storage Tank Connectors. 602.0 Insulation. 602.1 Thickness. 603.0 Storage Tanks. 603.1 Plans. 603.2 Atmospheric Tanks. 603.2.1 Overflow. 603.2.2 Makeup Water. 603.2.3 Draining. 603.3 Prefabricated Tanks. 603.4 Separate Storage Tanks. 603.4.1 Isolation. 603.5 Underground Tanks. 603.6 Pressure Vessels. 603.7 Devices. 603.7.1 Safety Devices. TABLES Table 602.1 Minimum Tank Insulation |
| 69 | 603.8 Tank Covers. 604.0 Materials. 604.1 General. 604.2 Construction. 604.3 Concrete. 604.4 Metal Tanks. 604.5 Filler Metal. 605.0 Expansion Tanks. 605.1 Where Required. 605.2 Systems with Open Type Expansion Tanks. 605.3 Closed-Type Systems. 605.4 Minimum Capacity of Closed-Type Tank. Table 605.4(1) Expansion Tank Capacities for Gravity Hot Water Systems |
| 70 | 606.0 Dry Storage Systems. 606.1 Waterproofing. 606.2 Detecting Water Intrusion. 606.3 Rock as Storage Material. 606.4 Odor and Particulate Control. 606.5 Combustibles Within Ducts or Plenums. Table 605.4(2) Expansion Tank Capacities for Forced Water Systems |
| 72 | Chapter 7 Geothermal Energy Systems 701.0 General. 701.1 Applicability. 701.1.1 Prior to Construction. 701.1.2 Equipment, Accessories, Components, and Materials. 701.2 Construction Documents. 701.3 Site Survey. 701.4 Decommissioning and Abandonment. 702.0 Groundwater Systems. 702.1 General. 702.1.1 Test Wells. 702.1.2 Installation of Water Wells. 703.0 Design of Systems. 703.1 Ground-Heat Exchanger Design. 703.2 Installation Practices. |
| 73 | 703.3 Verification. 703.4 Vertical Bores. 703.4.1 Backfill. 703.4.2 U-Bends and Headers. 703.4.2.1 Test Pressure. 703.4.2.2 Testing Procedure. 703.4.2.3 Calculation of Static Pressure (Water). 703.4.2.4 Calculation of Static Pressure (Other Fluids). 703.5 Underground Piping and Submerged Materials. 703.5.1 Polyethylene (PE). 703.5.1.1 Joining Methods for Polyethylene Pipe or Tubing. |
| 74 | 703.5.2 Cross-Linked Polyethylene (PEX). 703.5.2.1 Joining Methods for Cross-Linked Polyethylene Pipe or Tubing. 703.6 DX Systems. 703.7 Indoor Piping. 704.0 Installation. 704.1 Trenching, Excavation, and Backfill. 704.2 Trenches, Tunneling, and Driving. 704.3 Excavations and Open Trenches. 704.4 Protection of Piping, Materials, and Structures. 704.5 Sleeves. 704.6 Steel Nail Plates. |
| 75 | 705.0 Specific System Components Design. 705.1 Heat Exchangers. 705.2 Heat-Transfer Medium. 705.3 On Site Storage. 705.4 Insulation. 706.0 Ground-Heat Exchanger Testing. 706.1 Testing. 706.2 DX System Testing. 707.0 Heat Pump and Distribution System Design. 707.1 General. 707.2 Heat Pump Distribution System. 707.3 Circulating Pumps. 707.4 Heat Pump and Distribution System Installation. 708.0 System Start-Up. 708.1 General. |
| 76 | 708.2 Operation and Maintenance Manual. |
| 78 | Chapter 8 Solar Photovoltaic Systems Part I – General. 801.0 General. 801.1 Electrical Wiring and Equipment. 801.2 Applicability. TABLES FIGURES Figure 801.2(1) Identification of PV Power Source Components Figure 801.2(2) Identification of PV System Components in Common Configurations |
| 79 | 802.0 General Requirements. 802.1 Photovoltaic Systems. 802.2 Equipment. 802.3 Qualified Personnel. 802.4 Multiple PV Systems. 802.5 Locations Not Permitted. 802.6 Photovoltaic Modules/Panels/Shingles. 803.0 Alternating-Current (ac) Modules. 803.1 Photovoltaic Source Circuits. 803.2 Inverter Output Circuit. Part II – Circuit Requirements. 804.0 Circuit Requirements. 804.1 Maximum Voltage. 804.1.1 Photovoltaic Source and Output Circuits. 804.1.2 DC-to-DC Converter Source and Output Circuits. Table 804.1.1 Voltage Correction Factors for Crystalline and Multicrystalline Silicon Modules |
| 80 | 804.1.2.1 Single DC-to-DC Converter. 804.1.2.2 Two or More Series Connected DC to-DC Converters. 804.2 Bipolar Source and Output Circuits. 805.0 Circuit Sizing and Current. 805.1 Calculation of Maximum Circuit Current. 805.1.1 Photovoltaic Source Circuit Currents. 805.1.2 Photovoltaic Output Circuit Currents. 805.1.3 Inverter Output Circuit Current. 805.1.4 Stand-Alone Inverter Input Circuit Current. 805.1.5 DC-to-DC Converter Source Circuit Current. 805.1.6 DC-to-DC Converter Output Circuit Current. 805.2 Conductor Ampacity. 805.2.1 Before Application of Adjustment and Correction Factors. 805.2.2 After Application of Adjustment and Correction Factors. 805.2.3 Adjustable Electronic Overcurrent Protective Device. 805.3 Systems with Multiple Direct-Current Voltages. 805.4 Sizing of Module Interconnection Conductors. 805.5 Standard Ampere Ratings. |
| 81 | 805.5.1 Fuses and Fixed-Trip Circuit Breakers. 805.5.2 Adjustable-Trip Circuit Breakers. 805.5.3 Restricted Access Adjustable-Trip Circuit Breakers. 806.0 Overcurrent Protection. 806.1 Circuits and Equipment. 806.2 Overcurrent Device Ratings. 806.3 Photovoltaic Source and Output Circuits. 806.4 Power Transformers. 807.0 Stand-Alone Systems. 807.1 General. 807.2 Wiring System. 807.2.1 Supply Output. Table 805.5.1 Standard Ampere Ratings for Fuses and Inverse Time Circuit Breakers |
| 82 | 807.2.2 Sizing and Protection. 807.2.3 Single 120-Volt Supply. 807.2.4 Energy Storage or Backup Power System Requirements. 807.2.5 Back-Fed Circuit Breakers. 807.2.5.1 Back-Fed Devices. 807.2.6 Voltage and Frequency Control. 808.0 Arc-Fault Circuit Protection (Direct Current). 808.1 Arc-Fault Circuit Protection. 809.0 Rapid Shutdown of PV Systems on Buildings. 809.1 Reduce Shock Hazard. 809.1.1 Controlled Conductors. 809.1.2 Controlled Limits. 809.1.2.1 Outside the Array Boundary. 809.1.2.2 Inside the Array Boundary. 809.1.3 Initiation Device. |
| 83 | 809.1.4 Equipment. Part III – Disconnecting Means. 810.0 Disconnecting Means. 810.1 Photovoltaic System Disconnecting Means. 810.1.1 Location. 810.1.2 Markings. 810.1.2.1 Field-Applied Hazard Markings. 810.1.3 Suitable for Use. 810.1.4 Maximum Number of Disconnects. 810.1.5 Rating. 810.1.6 Type of Disconnect. 810.1.6.1 Simultaneous Disconnection. 810.1.6.2 Devices Marked “Line” and “Load.” |
| 84 | 810.1.6.3 DC-Rated Enclosed Switches, Open-Type Switches, and Low-Voltage Power Circuit Breakers. 811.0 Disconnection of Photovoltaic Equipment. 811.1 Isolating Devices. 811.1.1 Location. 811.1.2 Interrupting Rating. 811.1.3 Isolating Device. 811.1.4 Equipment Disconnecting Means. Part IV – Wiring Methods. 812.0 Wiring Methods Permitted. 812.1 Wiring Systems. 812.2 Identification and Grouping. Table 812.1 Corrections Factors |
| 85 | 812.2.1 Identification. 812.2.2 Grouping. 812.3 Single-Conductor Cable. 812.3.1 Cable Tray. 812.4 Multiconductor Cable. 812.5 Flexible Cords and Cables. 812.6 Small-Conductor Cables. 812.7 Photovoltaic System Direct-Current Circuits on or in a Building. 812.7.1 Embedded in Building Surfaces. 812.7.2 Flexible Wiring Methods. 812.7.3 Marking and Labeling Required. Table 812.5 Minimum PV Wire Strands |
| 86 | 812.7.4 Markings and Labeling Methods and Locations. 812.7.5 Types of Equipment Grounding Conductors. |
| 87 | 812.8 Flexible, Fine-Stranded Cables. 812.9 Bipolar PV Systems. 813.0 Component Interconnections. 813.1 Concealed Fittings and Connectors. 814.0 Connectors. 814.1 General. 814.1.1 Configuration. 814.1.2 Guarding. 814.1.3 Type. 814.1.4 Grounding Member. 814.1.5 Interruption of Circuit. 815.0 Access to Boxes. 815.1 Junction, Pull, and Outlet Boxes. Part V – Grounding and Bonding. 816.0 Grounding and Bonding. 816.1 PV System Grounding Configurations. 816.1.1 Electrical System Grounding. 816.1.2 Grounding of Electrical Equipment. 816.1.3 Bonding of Electrical Equipment. 816.1.4 Bonding of Electrically Conductive Materials and Other Equipment. |
| 88 | 816.1.5 Effective Ground-Fault Current Path. 816.2 Ground-Fault Protection. 816.3 Ground-Fault Detection. 816.4 Isolating Faulted Circuits. 817.0 Point of System Grounding Connection. 817.1 Grounding Connection. 818.0 Equipment Grounding and Bonding. 818.1 General. 818.1.1 Photovoltaic Mounting Systems and Devices. 818.1.2 Equipment Secured to Grounded Metal Supports. 818.1.3 With Circuit Conductors. 818.2 Equipment Fastened in Place or Connected by Permanent Wiring Methods (Fixed) — Grounding. 818.2.1 Equipment Grounding Conductor Types. 818.2.2 With Circuit Conductors. 818.3 Nongrounding Receptacle Replacement or Branch Circuit Extensions. |
| 89 | 818.4 Equipment Secured to Grounded Metal Supports. 819.0 Size of Equipment Grounding Conductors. 819.1 General. 819.1.1 Equipment Grounding Conductor Installation. 819.1.2 Raceway, Cable Trays, Cable Armor, Cablebus, or Cable Sheaths. 819.1.3 Aluminum and Copper-Clad Aluminum Conductors. Table 819.1 Minimum Size Equipment Grounding Conductors for Grounding Raceway and Equipment |
| 90 | 819.1.4 Equipment Grounding Conductors Smaller Than 6 AWG. 820.0 Array Equipment Grounding Conductors. 820.1 PV Modules. 821.0 Grounding Electrode System. 821.1 Electrode System. 821.2 Buildings or Structures Supporting a PV Array. 821.2.1 Size of the Direct-Current Grounding Electrode Conductor. 821.2.2 Not Smaller Than the Neutral Conductor. 821.2.3 Not Smaller Than the Largest Conductor. 821.2.4 Connected to Rod, Pipe, or Plate Electrodes. 821.2.5 Connected to a Concrete-Encased Electrode. 821.2.6 Connected to a Ground Ring. 821.3 Additional Auxiliary Electrodes for Array Grounding. 821.3.1 Metal Underground Water Pipe. |
| 91 | 821.3.2 Metal In-Ground Support Structure(s). 821.3.3 Concrete-Encased Electrode. 821.3.4 Ground Ring. 821.3.5 Rod and Pipe Electrodes. 821.3.6 Other Listed Electrodes. 821.3.7 Plate Electrodes. 821.3.8 Other Local Metal Underground Systems or Structures. 821.3.9 Not Permitted for Use as Grounding Electrodes. 822.0 Equipment Bonding Jumpers. 822.1 Bonding Jumpers. Part VI – Marking. 823.0 Marking. 823.1 Directory. 823.2 Modules. 823.3 Format. |
| 92 | 824.0 Alternating-Current Photovoltaic Modules. 824.1 Identification. 825.0 Direct-Current Photovoltaic Power Source. 825.1 Labeling. 825.2 Interactive System Point of Interconnection. 826.0 Photovoltaic Systems Connected to Energy Storage Systems. 826.1 Marking. 827.0 Facilities with Stand-Alone Systems. 827.1 General. 827.2 Facilities with Utility Services and Photovoltaic Systems. 827.3 Buildings with Rapid Shutdown. 827.3.1 Rapid Shutdown Type. Figure 827.3.1(1) Label for PV Systems that Shut Down the Array and the Conductors Leaving the Array |
| 93 | 827.3.2 Buildings with More Than One Rapid Shutdown Type. 827.3.3 Rapid Shutdown Switch. Part VII – Connection to Other Sources. 828.0 Connection to Other Sources. 828.1 PV Systems. Part VIII – Energy Storage Systems. 829.0 Energy Storage Systems. 829.1 General. 830.0 Batteries. 830.1 Battery Locations. 831.0 Self-Regulating Charge Control. 831.1 General. 831.1.1 Charge Control. Figure 827.3.1(2) Label for PV Systems that Shut Down the Conductors Leaving the Array Only |
| 94 | 831.1.2 Diversion Charge Controller, Sole Means of Regulating Charging. 831.1.3 Diversion Charge Controller, Circuits with Diversion Charge Controller and Diversion Load. 831.1.4 Energy Storage Systems Using Utility-Interactive Inverters. 831.1.5 Charge Controllers and DC-to-DC Converters. Part IX – Large-Scale Photovoltaic (PV) Electric Power Production Facility. 832.0 Large-Scale Photovoltaic (PV) Electric PowerProduction Facility. 832.1 Scope. 832.2 Special Requirements for Large-Scale PV Electric Supply Stations. 832.3 Equipment Approval. 832.4 Engineered Design. 832.5 Conformance of Construction to Engineered Design. 832.6 Direct Current Operating Voltage. |
| 95 | 832.7 Disconnection of Photovoltaic Equipment. 832.8 Arc-Fault Mitigation. 832.9 Fence Grounding. |
| 96 | Chapter 9 Referenced Standards 901.0 General. 901.1 Standards. TABLES Table 901.1 Referenced Standards |
| 101 | 901.2 Standards, Publications, Practices, and Guides. Table 901.2 Standards, Publications, Practices, and Guides |
| 103 | Abbreviations in Table 901.1 and Table 901.2 |
| 104 | Appendices Table of Contents |
| 106 | Appendix A Engineered Solar Energy Systems A 101.0 General. A 101.1 Applicability. A 101.2 Authority Having Jurisdiction. A 101.3 Conformance. A 101.4 Alternate Materials and Equipment. A 102.0 Engineered Solar Energy Systems. A 102.1 Definition. A 102.2 Inspection and Installation. A 102.3 Owner Information. A 103.0 Water Heat Exchangers. A 103.1 Protection of Potable Water System. A 103.2 Where Permitted. A 103.3 Other Designs. |
| 108 | Appendix B Solar Photovoltaic System Installation Guidelines B 101.0 General. B 101.1 Applicability. B 101.2 Alternate Materials and Methods. B 102.0 Marking. B 102.1 General. B 102.2 Main Service Disconnect. B 102.2.1 Marking Content and Format. B 102.3 Marking for Direct Current Conduit, Raceways, Enclosures, Cable Assemblies, and Junction Boxes. B 102.3.1 Marking Content and Format. B 102.4 Inverters. B 103.0 Access, Pathways, and Smoke Ventilation. B 103.1 General. B 103.2 Residential Systems—Single and Two-Unit Residential Dwellings. B 103.2.1 Access or Pathways. B 103.2.2 Smoke Ventilation. B 103.3 Commercial Buildings and Residential Housing Comprised of Three or More Units. FIGURES |
| 109 | B 103.3.1 Access. B 103.3.2 Pathways. B 103.3.3 Smoke Ventilation. B 104.0 Location of Direct Current (dc) Conductors. B 104.1 General. B 105.0 Ground Mounted Photovoltaic Arrays. B 105.1 General. |
| 110 | Figure B 103.2(1) Solar System on Cross Gable Roof–Single And Two–Unit Residential Building Figure B 103.2(2) Solar System on Cross Gable Roof With Valley–Single And Two-Unit Residential Building |
| 111 | Figure B 103.2(3) Solar System on Full Gable Roof Single And Two-Unit Residential Building Figure B 103.2(4) Solar System on Full Hip Roof–Single And Two-Unit Residential Building |
| 112 | Figure B 103.3(1) Solar Array Installation on Large Commercial Buildings With 8 Foot Walkways Figure B 103.3(2) Solar Array Installation on Large Commercial Buildings With 4 Foot Wide Walkways With 8 Foot By 4 Foot Venting Cutouts Every 20 Foot Length |
| 113 | Figure B 103.3(3) Solar Array Installation on Small Commercial Buildings with 4 Foot Wide Walkways With 8 Foot By 4 Foot Venting Cutouts Every 20 Foot Length Figure B 103.3(4) Solar Array Installation on Small Commercial Buildings With 8 Foot Wide Walkways |
| 114 | Appendix C Supplemental Checklist for Solar Photovoltaic Systems C 101.0 Plan Details. C 101.1 General. C 101.2 Circuits. |
| 115 | C 101.3 Overcurrent Protection. C 101.4 Disconnecting Means. C 101.5 Wiring Method. C 101.6 Grounding. C 101.7 Ground Fault Protection. C 101.8 Systems Over 1000 Volts. C 101.9 Calculations. |
| 116 | Useful Tables Unit Conversions |
| 117 | Symbols |
| 120 | Index |
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IAPMO USHGC 2021
Uniform Solar, Hydronics and Geothermal Code Published By Publication Date Number of Pages IAPMO 2021
