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legally you can use #10 awg wire but I would recommend using #8 awg wire. It would not get as hot as # 10 awg and could carry any overload you could have before the breaker would trip out...The breaker would trip very fast on any overload or shorted circuit before the amperage could affect either size wire but the #8 wire would just stay cooler. #10 AWG can only be fused at 30 amps per the "note" in national electric code (NEC) even though chart shows its ampacity is greater. Therefore, a load of 38 needs the larger wire. In addition if the furnance contains a motor load (usually it does) the motor part must have an extra 25% capacity added to the wire ampacity. So your 38 amp load may actually need wire sized to 40+ amps depending on the motor load. In addition if the ambient temperature of the room is high (like a boiler room) an additional factor probably need to be added. Refer to the charts in NEC
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How much coal coke is needed to run a blast furnace for one day?
that would depend on the size of the blast furnace.
What size wire is needed for carrying 100 amps under ground?
To calculate the wire size, a system voltage is needed.
What size wire should you use for a device operating on 240 VAC pulling 22 amps?
wire is often rated at 600 vac, 22 amps reqires # 10
What size wire needed for 25 amps 220 volts for 75 feet?
10 AWG in copper.
What size wire and breaker do you need for a 5000 watt garage heater?
Look on the heater and see what amps it is pulling. That will determine the wire size and breaker size. It must be on a dedicated circuit. 15 amps = AWG # 14 wire with 15 amp breaker 20 amps = AWG # 12 wire with 20 amp breaker 30 amps = AWG # 10 wire with 30 amp breaker 40 amps = AWG # 8 wire with 40 amp breaker
How much coal coke is needed to run a blast furnace for one day?
that would depend on the size of the blast furnace.
What size wire is needed for carrying 100 amps under ground?
To calculate the wire size, a system voltage is needed.
What size wire should you use for a device operating on 240 VAC pulling 22 amps?
wire is often rated at 600 vac, 22 amps reqires # 10
What size wire for a 5 ton a c outside unit pulling 35amps?
Number 8. Rated for 40 amps
What size ground wire needed for 75 amps at 208 volts?
#8 copper
What size wire and breaker for a 240 volt single phase 20 kw electric furnace rated at 83.3 amps?
AWG #3 copper.
What size wire needed for 25 amps 220 volts for 75 feet?
10 AWG in copper.
What size wire and breaker do you need for a 5000 watt garage heater?
Look on the heater and see what amps it is pulling. That will determine the wire size and breaker size. It must be on a dedicated circuit. 15 amps = AWG # 14 wire with 15 amp breaker 20 amps = AWG # 12 wire with 20 amp breaker 30 amps = AWG # 10 wire with 30 amp breaker 40 amps = AWG # 8 wire with 40 amp breaker
What size wire is needed for a piece of equipment that draws 28 amps?
A #10 copper conductor with an insulation factor of 90 degrees C is rated at 30 amps.
What size furnace do I need?
The size of the furnace depends on the square footage of the house you are heating.
What size furnace do you need for your house?
1200 foot propane furnace what size do i need
A range name plate says 78 amps what size breaker needed?
Canada and US - Standard size breaker in home panel is 40 amps for stove. If not standard range open Discuss Question page.
