Voltage drop

[Darkwood]

so for say 3 60w fittings. 120w/230 =0.8a 66% of this is 0.53?

1x 13a socket say its total load is 12a so theres no diversity for this. so could i then say 12.53 is my design current (Ib)

So vd = (9.5 x 12.53 x60) / 1000

So vd is 7.14.

Now do i use 6.9 for lights or 11.5 for power to see if the Vd is acceptable. Sorry for the questions just wana get it straight. Thanks

3 X 60 watt fittings = 180watts me thinks, getting the initial values right may help you.Think you just type error as you summed it as 180w.

 

[Robo]

Cheers sintra. So because my vd is a little to high what would you do. \thers no way the customer will wanna replace this cable.thanks

 

[pushrod]

TBH i would think you could save yourself/the customer some money and do without the submain and just fuse the supply down to 10A for the socket (and label it) and down to 3A for the lights and then you will be well within any volt drop limits. What do others think?

 

[Robo]

Sounds like a plan to me pushrod. As long as its well labelled i think its ok. I didnt kno u could get 10a fuses. Excuse my ignorance