 VOLTAGE DROP SELF CHECK QUESTIONS 2

Q1. Calculate the total voltage drop from point of supply to the load.

16mm, V90, building wire, 400V consumer mains are 14m long and are carrying 40Amps. A circuit fed from the consumer mains is 23m long, wired in 2.5mm, V90, TPS, 230V, supplying a 9A load. **Hint - remember to calculate the consumer mains @ 230V**

Q2. Calculate the total voltage drop from point of supply to the load.

10mm, V90, building wire, 400V sub-mains are 24m long and are carrying 32Amps. A circuit fed from the consumer mains is 23m long, wired in 2.5mm, V90, TPS, 230V supplying a load of 1.6kW. **Hint - remember to calculate the consumer mains @ 230V**

Q3.Calculate the total voltage drop from point of supply to the load.

35mm, V75, building wire, 400V sub-mains are 40m long and are carrying 65Amps. A circuit fed from the consumer mains is 34m long, wired in 4mm, V90, orange circular, 400V supplying a load of 3kW. Q4.Calculate the total voltage drop from point of supply to BOTH of the loads.

The consumer mains are 25mm, V75, building wire, 400/230V and are 28m long with a maximum demand of 85Amps.

The 400V 2.5kW load circuit is 46m long, wired in 4mm, V90, orange circular.

The 230V 12A load circuits is 34m long, wired in 2.5mm V90 TPS. 