Emergency Lighting Central Test Unit

[Craig.doyle82]

I am wiring a premises that contains a Main Distribution Board and two Sub Distribution Board (SDB).

I have wired a central test unit (CTU) in each sub board for the relevant emergency lighting in the area that the SDB is feeding, however the architect wants just one central test unit in the Main Distribution Board to test all of the emergency lighting.

Is it acceptable to have a CTU in each SDB?

Each circuit, controlled by a mcb/rcbo must be identified per area, and tested as such. So either an addressable EM controller, separate keyswitch area contro,l or a central contactor controlling all EM circuits from a central keyswitch identified as such.

 

[guest119]

A test switch at the main location pulling in (or dropping out) the sub board contactors is kinda normal if only one test location required.
Labels on the sub board units need to indicate another supply present, the incoming test control circuit.


Boydy

 

[rapparee]

I am wiring a premises that contains a Main Distribution Board and two Sub Distribution Board (SDB). I have wired a central test unit (CTU) in each sub board for the relevant emergency lighting in the area that the SDB is feeding, however the architect wants just one central test unit in the Main Distribution Board to test all of the emergency lighting. Is it acceptable to have a CTU in each SDB?

i can tell you that we have a ctu at each separate distribution board, but i'm in the north, is it a building control thing in the south or just a solo run from the architect

 

[guest119]

Usually the consultant/ designer specifies the likes of this and it would normally be on the construction issue drawings, or will be additional works.

Boydy

 

[Craig.doyle82]

There is no consultant on the job but the architect fancies himself a bit as an electrical engineer

 

[Craig.doyle82]

Cheers boydy

 

[Craig.doyle82]

i can tell you that we have a ctu at each separate distribution board, but i'm in the north, is it a building control thing in the south or just a solo run from the architect

To be honest I think the architect is being awkward. Job is complete with no issues but he has piped up with this at the last meeting. I've always wired a ctu at each sub board

 

[rapparee]

To be honest I think the architect is being awkward. Job is complete with no issues but he has piped up with this at the last meeting. I've always wired a ctu at each sub board

well then he's a bit late, go in with a variation order and ask him if he wants to pay the extra needed, or see if the quantity surveyor will allow the extra costs

 

[snowhead]

Offer a price to configure to 1 test point.
Then a price to stick a label on the main DB stating 2 test points and their location and maybe a label on each sub identifying that the other CTU exists.

I know which one he'll go for.

I'd guess he's concerned whoever tests may not test all the E.M's

 

[atm84]

What was in the original speciation? Where has this variation come from? Has it just come up now or was it mentioned earlier?