Furnace Wiring Gauge

However typically electric furnaces require a draw between 60 and 80 amps.

Furnace wiring gauge. Yellow jacket gauge set hoses https amzn to 2vlvkv9. Install the new thermostat. Wiring a new thermostat is made simple with our handy instructions for thermostat wiring. Thermostat wiring to a furnace and ac unit.

By multiplying the volts by amps you will receive total wattage. For instance wire from a power source to an electric heating element may be a larger 10 or 8 gauge 105c wire. Look for the common wire step 2. Breaker size based on wattage the size of a breaker is determined by the amp draw.

Multi stage systems can require up to 8 conductors because of the amount of communication needed between the thermostat and air handler or furnace. Color code how it works diagram. How do i wire an electric furnace with heating elements. The above list represents the most common combinations of wire available for air conditioning and heating wires.

Ac service tech llc. Do keep in mind that other wiring found in a furnace may be larger than 14 gauge but it is usually for direct wiring ie no plugs used. Common sizes include 14 12 10 8 6 and 2 gauge wire. Electrical current is measured in ampacity and each wire gauge has a maximum safe carrying capacity.

Choosing the proper gauge. Stranded wire will carry more of a load than solid. 18 or 20 18 gauge thermostat wire is recommended for any distances up to 250 feet. For shorter runs use 20 gauge.

For standard non metallic nm cable these amperage capacities are. For example if the red wire is connected to w on the thermostat the furnace should turn on. I ran number 6 wire with ground from my 100 amp service box where i installed a 60amp double pole breaker. I have installed an electric furnace with a 15 kw heat element.

Learn your wiring step 3. Paint pens markers step 1. Furnace thermostat wiring diagram terminal letters on a thermostat and what they control the hot wire 24 volts usually red from the transformer is the main power wire to turn on or off a furnace components. Most wire is also stranded verses solid.

The exact amps an electric furnace requires is solely based on the size of the furnace and its performance capabilities. The size of the wire dictates how much current can safely pass through the wire. Other combinations of wire may be available. 18 gauge standard single stage heat thermostat standard a c condenser ac contactor 24 volt fan only operation common air conditioning 1st stage heat white 2nd stage heat some ac systems will have a blue wire with a pink stripe in place of the yellow or y wire.