voltage drop.

[Robo]

6.9 v for lighting
11.5 for a socket.

So my question is to calculate the size of a supply cable to a building that had lighting power heating for example. What figure would i use for voltage drop.

Is there a wxtra safe rule of thumb method ppl use?

 

[gamblor6]

id use the 11.5v mate. its not just sockets its everything other than lights. to the best of my limited knowledge the vd limits are because light fittings some times have voltage sensitive equipment.

 

[Sintra]

6.9 v for lighting
11.5 for a socket.

So my question is to calculate the size of a supply cable to a building that had lighting power heating for example. What figure would i use for voltage drop.

Is there a wxtra safe rule of thumb method ppl use?

If the sub main has both lighting and power as final circuits then you need to use the figure of 6.9V or 3%. This has to be the maximum volt drop from the origin to the last point on the lighting circuit.

 

[Sparky Ninja]

Voltage drop is monitored to ensure that loads are not deprived of too much of their operating voltage due to cable resistance.

Each final circuit will be treated independently, whilst distribution circuits may need further consideration.

 

[solo2771]

As Sintra says
Paul

 

[gamblor6]

i got confoddled lol it is sat night. 6.9 not 11.5