Photovoltaic panel iron frame installation drawings

What is a roof mounted photovoltaic system guidance?

The guidance refers only to the mechanical installation of roof mounted integrated and stand-off photovoltaic systems; it provides best practice guidance on installation requirements and does not constitute fixing instructions.

How are PV module frames bonded to the qrail system?

PV module frames are electrically bonded to the QRail system by the bonding mid clamps. Bonding mid clamps are preassembled and bonded with stainless steel bonding plate or pins below the clamp head.

How do you attach a PV module to a rail?

Module Clamp: Secures the PV module to the rail. Use four clamps for each Ballast Tray, two on north and south two Ballast Trays. Multiple sizes available depending on thickness of PV module. Wind Deflector: Joins Ballast Trays together into a continuous structural member. Distributes and reduces loading on roof structure.

Is mechanical design of a PV array within the scope of this document?

Mechanical design of the PV array is not within the scope of this document. BRE digest 489 ‘Wind loads on roof-based Photovoltaic systems’, and BRE Digest 495 ‘Mechanical Installation of roof-mounted Photovoltaic systems’, give guidance in this area.

What is the inspection and testing of PV array circuits?

The inspection and testing of d.c. circuits, particularly testing PV array circuits requires special considerations. Appendix C covers the inspection and testing of PV array circuits and documentation to be provided. PV array/string performance tests are recommended to verify performance as a check for faulty modules.

How do I choose a cable for a PV array?

Cables routed behind a PV array must be rated for a minimum temperature of 80 ̊C. Cables must be selected so as to minimise the risk of earth faults and short-circuits. This can be achieved by reinforcing the protection of the wiring either through: a. Single conductor cable – both insulated and sheathed (eg “PV cable”, HO7RNF cables)