Wire type ok inside conduit?


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Old 07-31-14, 05:30 PM
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Wire type ok inside conduit?

Hi all. I ran 2" conduit to make it easy for me to snake wire through. I pulled wire through then realized I didn't confirm it's the right type. It says its water resistant, and it's the 3 wire in sheath type.

I running it to pond area underground in conduit.

Will power an external pump 125 volt 1.8 amps

40 watt uv light

X-mas lights or LEDs around pond

Every couple weeks I'll hook up a 1hp spa blower to clean filter

Wire type
CAROL 3/C 12 AWG (3.31 mm2) 90 degrees (UL) SJ OR WATER RESISTANT 300 volt RohS
 
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Old 07-31-14, 06:18 PM
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It says its water resistant, and it's the 3 wire in sheath type.
That is not wire. That is cable. Best practice is to run wire not cable in conduit. Service cable such as you have is not suitable for use as permanent wiring. It is intended for use as cords on equipment. You need #12 THWN (one black, one white, one green) or 12-2 UF-b if you use cable. Conduit needs not be larger than 1" for UF or " for THWN individual conductors.

Above assumes a single pole 20 amp breaker and conduit buried at least 18".
 
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Old 08-02-14, 04:48 PM
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Ok thanks. Would it hurt to use it for awhile until I get the right stuff, instead a cord across lawn.

So basically even cable is ok to use, but needs to say UF? Is UF material stronger?

Thanks
 
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Old 08-02-14, 05:35 PM
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You should always use the correct materials. Not stronger but designed for that purpose. However as I wrote best practice is to not use cable. Use THWN individual wires.
 
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Old 08-02-14, 06:29 PM
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So basically even cable is ok to use, but needs to say UF? Is UF material stronger?
UF-B cable is for outside and direct burial use. Rule-Of-Thumb: Never pull UF-B cable into conduit.
 
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Old 08-02-14, 07:20 PM
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CAROL 3/C 12 AWG (3.31 mm2) 90 degrees (UL) SJ OR WATER RESISTANT 300 volt RohS
That is not even cable, that is SJ cord.

For PVC conduit I do not recommend anything smaller then 3/4"
 
 

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