jimmybobbob
Well-known member
- Joined
- Jul 7, 2015
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Hi all,
Here's one to scratch your head at or I'm missing something very serious.......
Here you have it:
soon to wire up an extension for a builder....nothing to exciting (sockets, LED down lights etc..) and part on the on going job is moving the supply cable numerous times (minds being changed and digging up of driveways grrrrrrrrr)
What I'm confused at, although I have my own thoughts, is that the supply comes underground, up the wall, into the meter box and terminates into the usual henleys 3p cut out. Its a 3p 4 wire system and is PME.
The previous electrician installed a 3p&n DB with a 300mA 4 pole RCD underneath. The tails came out of the meter box (out of the 4 pole isolation switch obv) up the wall then into the rcd then into the DB main switch. The DB is located in a stable adjacent to the dwelling and is to serve lighting and power in the stable block and obviously supplies the house
.
Now the supply to the house used to be via a 16mm 4 core swa with a separate 16mm cpc buried underground. 2 cores were used to supply the existing house with a view to use the other 2 core to supply a new consumer unit for the extension. Things have been changed around and moved so now I have installed a 25mm 3 core swa to supply both the existing house and the new extension (installing a double decker board)
As I previous said I have my own thoughts (unless im missing something serious) but want to put it out there.......what's with the 300mA RCD below the 3p&n DB?A
Any comments or answers welcome
cheers
Here's one to scratch your head at or I'm missing something very serious.......
Here you have it:
soon to wire up an extension for a builder....nothing to exciting (sockets, LED down lights etc..) and part on the on going job is moving the supply cable numerous times (minds being changed and digging up of driveways grrrrrrrrr)
What I'm confused at, although I have my own thoughts, is that the supply comes underground, up the wall, into the meter box and terminates into the usual henleys 3p cut out. Its a 3p 4 wire system and is PME.
The previous electrician installed a 3p&n DB with a 300mA 4 pole RCD underneath. The tails came out of the meter box (out of the 4 pole isolation switch obv) up the wall then into the rcd then into the DB main switch. The DB is located in a stable adjacent to the dwelling and is to serve lighting and power in the stable block and obviously supplies the house
.
Now the supply to the house used to be via a 16mm 4 core swa with a separate 16mm cpc buried underground. 2 cores were used to supply the existing house with a view to use the other 2 core to supply a new consumer unit for the extension. Things have been changed around and moved so now I have installed a 25mm 3 core swa to supply both the existing house and the new extension (installing a double decker board)
As I previous said I have my own thoughts (unless im missing something serious) but want to put it out there.......what's with the 300mA RCD below the 3p&n DB?A
Any comments or answers welcome
cheers