Conducting and grounding

A. Conducting cables on the roof

Let's start with the most important rule - all wires must be conducted in steel cable trays. Always mount the troughs to the counter-lath with Ø4x30 wood screws every 150-200mm. Remember that the wires do not come into direct contact with the wooden elements of the structure.

Lay the return cable in horizontal cable trays. It is this wire that will connect the first module in each string. Lead one end at the point of descent from the roof, and lead the other to the installation site of the first tile on the top.

At the junction of the troughs, always perform bridging with a ground wire. Thanks to this, you will maintain the electrical continuity of the entire trough system.

B. System grounding

The grounding system is based on three main elements:

· Connection of all cable trays with a yellow-green LGY cable with a cross section of at least 16mm²

· Grounding of tin roof sheathing elements

· Lead the ground wire together with DC wires to the inverter or to the facade

Remember that we lead the ground wire through the membrane in the pestle, together with the solar wires going to the inverter.

C. Assembly checklist

Before you finish the work, check:

· Whether all troughs are securely attached to the counter battens

· Whether the troughs are connected by a ground wire while maintaining continuity

· Whether the wires are properly laid in the troughs (without tension)

· Whether the ground wire is led in the right place

· Whether the ground connections are protected from corrosion

· Whether the protective pedestals are properly mounted in the membrane passages

Remember to perform all work with the power disconnected, and in case of doubt, consult Electrotile technical supervision.

‍