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Pv module clearances from roof edge.
The reason for this clearance is that it allows air flow under the solar panels for cooling them.
Current 2016 ca residential fire code roof clearance requirements pathways to ridge street access 2016 ca intervening code cycle supplement.
60mm gap 120mm from roof edge 70mm gap 140 mm from roof edge etc.
Exposed non current carrying metal parts of pv module frames electrical equipment and conductor enclosures must be grounded.
The remainder of the installation such as panel boards raceways boxes fittings.
Mcs say 600mm building regs is grey one report that it is 300mm another company that thinks its 400mm.
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No solar pv systems should extend beyond the edges of the roof.
In some cases access pathways for roof faces with pv may be on roof faces adjacent to the roof face with pv modules.
Panels with a minimum distance between the panel and roof edge of 2s where s is the gap between the underside of the panel and the roof surface.
Solar panels you want to mount on a roof must have at least 3 inches but 4 to 6 inches is better distance between the roof and solar panels frame.
Roofs under windows now require 36 inch wide access pathway.
So if you have a 50mm high gap between panel and roof 100mm minimum distance panel from the roof edge.
Wind will get underneath and weaken the fixings leading to a potentially lethal situation.
The intent of this brief is to provide code related information about photovoltaic systems to help ensure that what is proposed regarding the photovoltaic product itself including accessories such as inverters and controls as well as their individual and collective installation can be verified as being in compliance with safety related codes and standards for residential construction.
Depending on where you live different laws exist as to how close solar panels are allowed to be from a roof edge.
A pv installer is allowed to construct the support system mount the modules inverters or optimizers and connect the factory provided module wiring harness plug and play.
Solar electric supply inc a leading solar power system integrator wholesale supplier of complete solar electric systems.
Nec 690 defines electrical safety requirements for pv systems.
Devices listed and identified for grounding the metal frames of solar modules or other equipment can bond.
Structure as equipment grounding conductor.
