Check the electrical load and ensure that the sensors do not exceed the 10 Amp maximum. Check the tightness of electrical connections along the power. How should I wire a construction switchboard when the supply has 3 phases and neutral but no separate ground: bridge PE to N, add grounding, or rely on an RCD? If the supply is TN-C with a PEN conductor, bring the PEN to the construction switchboard and split it into separate N and PE there; do not. A 3 Phase Electrical Distribution Box is vital in managing high power demands in industrial setups, events, and commercial buildings. It ensures smooth power flow, efficiently distributing electricity to various systems. The very cheapest one you can find at a local hardware store (or online) will work great. They tell you if electricity is flowing through the. TO EVERY CIRCUMSTANCE OR ELECTRICAL SYSTEM. SRP ENCOURAGES EACH USER TO CONSULT WITH ITS OWN TECHNICAL ADVISOR CONCERNING THE APPLICABILITY OF THESE TANDARDS TO THE USER'S SPECIFIC SITUATION. THE USER ASSUMES ALL RIS USE OF OR RELIANCE ON THESE SPECIFICATIONS. ALL REPRESENTAT ERIA ND FACILITIES. 8. 2 Setting and Removing Meters - None but duly authorized agents of the Company or persons authorized by law shall set or remove, turn on or turn off, or make any changes which will affect the accuracy of such meters.