16 mm2 swa
- Thread starter chowbasa
- Start date
Sponsored Links
B
Big_Spark
chowbasa said:
Nope, the volt drop over that distance for that load is 7V so well within the 4% (9.2V) limit imposed by BS7671.
However will whatever it is powering have a heavy startup current?
Sponsored Links
B
Big_Spark
chowbasa said:
So where does the 20A come from then??
When calculating cable size you should worry about the supply you NEED.
If you have a 2kW hoover...8.6A
12 of 100W lamps = 5.2A ( I know you won't have 12 lights..just an example)
Total load = 13.8A
Protect it with a 300mA 16A RCBO at the supply end, and two seperate circuits the other, one a 16A RCBO for the socket and a 6A MCB for the lights.
That being the case, the cable required would be 10mm2, thus saving a considerable amount of money on the cost of cable.
If you can drop the total load below 10A, then the cable required will drop to 6mm2 and still meet the regs.
DIYnot Local
Staff member
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local
