Can you take 2 phases to a consumer unit?

[Gigsy]

T

An enclosure and assembly absolutely can be rated for 400V or not as the case may be.

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?

 

[Gigsy]

T

An enclosure and assembly absolutely can be rated for 400V or not as the case may be.

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?

 

[Octopus]

At the front of the building

Hum .......

 

[Gigsy]

An enclosure and assembly absolutely can be rated for 400V or not as the case may be.

The switches are rated 230v/400v

 

[Gigsy]

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.

Incoming neutral goes to 1st neutral bar.
Then linked from there to each switch

 

[Gigsy]

Dual tariff board?

Not dual tariff

 

[davesparks]

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?

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?

 

[The Ghost]

Incoming neutral

Ah ok can see that now it makes sense.

 

[Gigsy]

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?

I will take a look on the lid tomorrow, thank you.

 

[Gigsy]

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?

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?

 

[Midwest]

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?

 

[PEG]

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?

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?

 

[Spoon]

I came across a consumer unit today,

I don't think he has wired this CU.

 

[Gigsy]

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?

The 3rd phase (L1) goes to a consumer unit downstairs. I think they have balanced the load.

 

[Gigsy]

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?

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.