116 ft 12 gauge 15 amp circuit voltage drop


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Old 07-29-21, 05:30 PM
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116 ft 12 gauge 15 amp circuit voltage drop

Wanting to run 116 ft 12 g on 15 amp circuit. This is for a dedicated heated floor that draws 4.8 amps which is on a thermostat. This is the max draw being its dedicated. Will the voltage drop effect the usage of the heated floor?
 
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Old 07-29-21, 06:40 PM
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The short answer is no. At 116 feet even with 14 ga wire, the voltage drop is 2.49% at 4.8 amps of current. So, you will be just fine with #12 wire. The typical recommendation is to keep voltage drop to no greater than 3%.
 
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Old 07-30-21, 02:42 PM
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Thank you for the quick response!!!
Should I save some money and go with 14 gauge? I was going with 12 because of the length..
 
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Old 07-30-21, 04:27 PM
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What are the voltage requirements for the heated floor per the heating element manufacturer?
 
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Old 07-30-21, 05:17 PM
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Should I save some money and go with 14 gauge?
If it was me, I would use #14 wire. Especially with the cost of Romex nowadays! You should have no ill effects from voltage drop.
 
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Old 07-30-21, 07:27 PM
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Voltage-120, 4.0 amps, 475 watts with a resistance of 32.3 ohms. It’s a schluter ditra heat.

Thank you !!
 
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Old 07-30-21, 07:48 PM
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You may get a slightly higher voltage drop that would equate to a lower wattage output but will still be fine.
 
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Old 08-01-21, 06:34 AM
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Thanks for all your help! I ended up running 104 ft 12 g on a 20 amp circuit. Went with the 12 g because it was only $15 more. Thanks again.
 
 

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