1 circuit?

[telectrix]

hi, guys, slight confusion here, installing a lighting circuit in a barn. job is likely to be used for assessment so it's got to be spot on. Coming from 10A MCB in 1.5mm to 2 gang switch, one switch for each of a bay of 4 x 6' twin fluorescents ( both runs in 1.5mm ). Done the cable calcs no problems with volt drop. Problem is, the run from the MCB to the 2 gang switch is only 5m, whereas the runs from the switches to the last fittings are 30m and 45m respectively. do i measure both runs for R1+R2 and record them both?

 

[SirKit Breaker]

I would do the measurement at the farthest point out with all the switches on, and record the result.

 

[jam2020]

record the highest value r1r2 as it is only one circuit

 

[Amp David]

Measure at each point a record the highest. Your R1 R2 is the furthest point innit

 

[telectrix]

thanks guys. I'll measure at each JB and record the highest reading.