Board ratings

[maguire]

I am looking to replace a TP&N distribution board however, can anyone tell me why a board is rated thus,125A incoming &63A outgoing they are Hager Invicta range
M

 

[DaftPunk]

Erm because it can handle 125A on the incommer and 63A on the outgoing.

 

[AndyPRK]

63a being the maximum MCB size I assume?

And the main switch rated at 125a

 

[PrenticeBoyofDerry]

63a being the maximum MCB size I assume?

Also RCBO and Fuse carriers but they will be rated between 6A-50A

 

[Taylortwocities]

SHould you be doing this job?

 

[Lectrician]

All TPN boards are typically rated to 63amp on the outgoing ways, and either 125 or 250 on the busbar and incommer.

There are some boards which can go upto 125amp on a few selected out goers, eatons type H board for example.

Other than that, you would need to install an MCCB and (possibly) MCB board.

 

[maguire]

I had assumed that the max across three phases would 63A for a single use but the tech details did not make this clear, also the same limits apply to the 125 & 250 A boards, Lec I had a look at the possibilty of MCCB,s but it appears these are available on the panel boards only because they are able to handle greater outgoing loads etc, but as there is only one tri phase circuit for a vehicle lift I have opted for a standard MCB tri phase 16 way board
M

 

[ricicle]

Competence.

 

[Lectrician]

I had assumed that the max across three phases would 63A for a single use but the tech details did not make this clear, also the same limits apply to the 125 & 250 A boards, Lec I had a look at the possibilty of MCCB,s but it appears these are available on the panel boards only because they are able to handle greater outgoing loads etc, but as there is only one tri phase circuit for a vehicle lift I have opted for a standard MCB tri phase 16 way board
M

I only said MCCB board as it appeared that 63amp per way was not enough for you, and that you perhaps had a large circuit or two to accomdate. This is why I initially suggested the Eaton MEM H board, as it has two TP (six SP) 125amp outgoing ways, the remainder being the standard 63amp type. Ideal if you only have a couple large circuits. MCCB boards are usually installed, with one way feeding a standard MCB board.