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TP&N board

Former Community Member over 5 years ago

Hi all, what's the best sequence when installing a new TP&N board.

1) hang on wall and then build.

2) build and hang on wall

3) none of the above

Hate doing things twice!

Will be installing steel trunking to bring cables into DB and tails from below using steel trunking and 32mm bushes.

Regards Ts.

0 Former Community Member over 5 years ago

John Peckham:

As Alcomax says above.

I am not an electrician but how are you going to bet your 4 3 phase tails through a 32mm bush?

As Alcomax above says a header trunking above the DB but I would add a piece of paxaolin board between the header and the DB with the slot in the paxolin slightly smaller than the opening in the DB to protect the conductors entering the board. Also if you bolt the header straight on to the board you will not be able to put the lid on without cutting the lip of the lid away. Rather than straight on the wall a lot of sparks put a Unistrut frame on the wall and bolt to that. Mount the empty board, perhaps just the incomer isolator fitted. fit the MCBs/RCBOs, then put the ends away one at a time after testing each one.

Just out of interest when you were serving your time did you not watch/do a similar installation?

Lol, served my time has a fire & security engineer 30yrs, newish to electrical did level 3, 17th ed, inspect & test courses around 3 yrs ago. I'm really just bouncing ideas off folks that have more hands on experience than myself and no I've not done a TP&N installation before but I do enjoy a challenge ??.
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0 Former Community Member over 5 years ago

Hi Tatty

Same tatty that's on the fire forums??

Was going to put steel trunking top and bottom for the reasons you've mentioned along with a intumescent gasket between the board and trunking.

What's the point of mounting on strut? I've seen this on plenty of commercial sites can see it being handy for rear entry but that's it have I missed something here?

John have already given consideration to spacing between enclosures, but still a very valid point that you bring up.

Regards Ts
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0 tattyinengland over 5 years ago

HI Timeserved

I'm not the same Tatty as on the fire forums - I only knock around this forum.......I hope that Tatty is doing the name proud.

Kind Regards

Tattyinengland
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0 Former Community Member over 5 years ago

Hes keeping up the good name ?

Ts
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TP&N board

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