A metal cable tray and bracket length of not less than 2 and earth (PE) or receive zero (PEN) trunk is connected.
(2) non-galvanized metal plate between the two ends of the cable tray should be connected across the copper ground wire, ground wire cross-sectional area of not less than the minimum allowed 4mm2.
3 galvanized cable tray between the two ends of the connecting plate is not grounded jumper wire, but not less than two plate ends with lock nuts or lock washers connecting bolts.