adding a sub consumer unit

macromacaroon

will be having an electrican in adding a few new sockets and the old consumer unit is a single row unit and is full whats involved in adding a second unit/sub board?

2011

macromacaroon wrote: »

will be having an electrican in adding a few new sockets and the old consumer unit is a single row unit and is full whats involved in adding a second unit/sub board?

Normally:
- A main distribution board would supply 1 or more sub-distribution boards.
- A single 3 core cable from the main board would supply a sub distribution board.
- The sub-distribution board would have it's own main isolation switch.
- Final circuits are fed from the sub-distribution board.
- The sub-distribution board may be located close to the loads / circuits it is supplying.

In a domestic installation I would generally prefer to extend / or replace the existing board to meet the new requirements as this tends to be neater. Always allow 20% or more for future requirements.

macromacaroon

2011 wrote: »

Normally:
- A main distribution board would supply 1 or more sub-distribution boards.
- A single 3 core cable from the main board would supply a sub distribution board.
- The sub-distribution board would have it's own main isolation switch.
- Final circuits are fed from the sub-distribution board.
- The sub-distribution board may be located close to the loads / circuits it is supplying.

In a domestic installation I would generally prefer to extend / or replace the existing board to meet the new requirements as this tends to be neater. Always allow 20% or more for future requirements.

thanks for the reply, im in an at risk category so i just want the electrician in and out, so a more simple and straight forward job would suit me and from what way the electrician descibed the existing unit being upgraded and the work involved, i wasn't really instrested in the amount of time and labor involved

2011

Fair enough. Best of luck with it.