Advice install isolator switch for office AHU

[callan]

I'm 2330 qualified but I've limited three phase experience due to the fact most of my work is domestic. I've now been asked to provide an isolator switch for an Air Handling Unit located next to the fire escape stairs in an office back yard. The Air con engineer will wire up the AHU from the isolator switch.

My questions are - will I have to use SWA cable from the D/B to the isolator switch or can I use plasic/metal conduit with singles? And what type of isolator switch is required? The D/B is about 3m above the AHU. I haven't got the AHU spec with me now but I know it's not a huge industrial scale AHU. I'm going to check it out tomorrow.

Advice appreciated

 

[batty]

I personally use swa on three phase makes life easier but as long as cables are protected you can use what you like. Welcome to the forum Callan.

Batty

 

[M107]

from one of our forum sponsors

http://www.alertelectrical.com/Consumer-Units-Switchfuses-And-Isolators/Switchfuses-And-Isolators/Europa-Rotary-Isolators/default.asp

And I'd use swa.

 

[Evans Electric]

Suggest you install a 2.5 X 4 core SWA to a rotory isolator IP 65. Make gland off in the bottom , helps to keep the rain out.

Deke