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NMWU Vs RWU cable from main panel to outbuilding panel

awdottawa

New member
Joined
May 16, 2018
Messages
2
Location
Ontario
Building a 20 x 16 outbuilding which will also act as a pool shed with the pool equipment outside.

Pool pump (variable speed 230V, 11 amps max draw) and lighting main usage from the sub panel, it's not a workshop but would like to have enough capacity to run a 120V, 15A power tool if needs arise.

30 amp from main breaker to sub panel should be adequate for my needs.

The cable run from main panel to sub panel is approx 250feet.

I figure I need a 6/3 cable to keep the voltage drop tolerable and the cable will be 2 foot below grade sitting on 3" of sand.

The main question I have is should I use a NMWU direct burial copper cable or a RWU copper cable? I am inclined to go with NMWU but would appreciate any info on why I might want to or need to use RWU instead . I am in Ontario.
 
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wyliesdiesels

Well-known member
Joined
Aug 14, 2012
Messages
20,279
Location
Modesto, CA
Has the pool already been put in?

Is this just a swap out of existing equipment?

theres very specific code requirements for grounding and bonding of pools and their equipment.

Make sure to follow them to the T!!

Your life depends on it.

Whats the HP rating on the pump?

I dont know canadian code so cant help ya there...

Id be very hesitant to put any loads other than the pool equipment and lights on a pool subpanel.
 
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awdottawa

New member
Joined
May 16, 2018
Messages
2
Location
Ontario
The pool and the shed will be a new install.

Permits for all the electrical work will be requested and inspected with https://www.esasafe.com/

Thanks, yes, this will include specific permits and inspections of the grounding and bonding of the pool and equipment and ensure adherence to local code.

The pump is 230V variable speed and 1.85HP

The main electrical usage is pool pump, lights (inside and outside) and salt Chlorinator. A few receptacles in the shed are more of a nice to have and I am sure will come in handy at times.

Whats the reason to be hesitant about adding other loads to the panel if they are on a separate sub panel breaker ?
 

79firebird

Well-known member
Joined
Aug 19, 2008
Messages
385
Location
Victoria bc
I would see about going with teck cable might be way cheaper. just ran #2 for my grandparents gen 150 feet and my cost was under $200
 
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