Can you take 2 phases to a consumer unit? | Page 2 | on ElectriciansForums

Can you take 2 phases to a consumer unit?

Discuss Can you take 2 phases to a consumer unit? in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net

T
Risteard said:
An enclosure and assembly absolutely can be rated for 400V or not as the case may be.
Click to expand...

There is nothing on the metal box which identifies it as being rated for anything, The switches are rated for 400v. But they are only subject to 230v each?
It is a normal domestic consumer unit?

[ElectriciansForums.net] Can you take 2 phases to a consumer unit?
 
T
Risteard said:
An enclosure and assembly absolutely can be rated for 400V or not as the case may be.
Click to expand...

There is nothing on the metal box which identifies it as being rated for anything, The switches are rated for 400v. But they are only subject to 230v each?
It is a normal domestic consumer unit?
 
Vortigern said:
Ok well I am thinking why are there three neutrals on the first block on the right does this mean the neutral will be switched off with the first main switch, it is a bit hard to follow where the three neutrals go.
Click to expand...
Incoming neutral goes to 1st neutral bar.
Then linked from there to each switch
 
Gigsy said:
T


There is nothing on the metal box which identifies it as being rated for anything, The switches are rated for 400v. But they are only subject to 230v each?
It is a normal domestic consumer unit?
Click to expand...

That’s unusual, those contactum boards always used to have a label on the lid identifying the BS-EN standard they are built to, this standard will give the voltage and PSCC they are rated to. Maybe the sticker has fallen off?
 
davesparks said:
That’s unusual, those contactum boards always used to have a label on the lid identifying the BS-EN standard they are built to, this standard will give the voltage and PSCC they are rated to. Maybe the sticker has fallen off?
Click to expand...

I will take a look on the lid tomorrow, thank you.
 
davesparks said:
That’s unusual, those contactum boards always used to have a label on the lid identifying the BS-EN standard they are built to, this standard will give the voltage and PSCC they are rated to. Maybe the sticker has fallen off?
Click to expand...

I don't really understand this statement.

The metal box is just a metal box. The accessories inside the box ie. the switch, the RCD's and the MCB's are all marked with BS-EN numbers and breaking capacity numbers. Each accessory is only at a potential difference of 230v. I can do a PFC and PSCC test on the installation, but I know for a fact the tests will not exceed 6kA. Why do the accessories need to be rated at 25kA?
 
Last edited:
Gigsy said:
I don't really understand this statement.

The metal box is just a metal box. The accessories inside the box ie. the switch, the RCD's and the MCB's are all marked with BS-EN numbers and breaking capacity numbers. Each accessory is only at a potential difference of 230v. I can do a PFC and PSCC test on the installation, but I know for a fact the tests will not exceed 6kA. Why do the accessories need to be rated at 25kA?
Click to expand...

Not strictly true,as someone has had to assess,test,approve and certify that "box".

A test of this,is how many DB's with the equipment listed,have you seen,with a home made enclosure?
 
Midwest said:
I thought if you were going to use more than one phase, you used three to balance the load? So why would you use a domestic CU designed for a typical single phase domestic property, when you could use a properly designed three phase board, intended for that use?
Click to expand...

The 3rd phase (L1) goes to a consumer unit downstairs. I think they have balanced the load.
 
PEG said:
Not strictly true,as someone has had to assess,test,approve and certify that "box".

A test of this,is how many DB's with the equipment listed,have you seen,with a home made enclosure?
Click to expand...

It is not a home made enclosure, It is made by contactum.
The box has a 400v sticker on it, so anybody who wishes to service it knows the potential voltage.
 

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