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Connect Wires to Disconnect Box

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Electrician Tips: On wiring HVAC Condensers #electrician #hvac #tips

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What happens here

With the conduit in place, proceed to wire the HVAC disconnect box. The incoming power feed, typically from the main electrical panel, is routed into this box. The video shows an 8/3 Romex cable, but notes that the white (neutral) wire is capped off and not connected because the air condenser is a 240V appliance and does not require a neutral connection. The black and red wires (hot conductors) are connected to the line side of the disconnect terminals, and the green wire (ground) is connected to the dedicated ground bar inside the disconnect box. A money-saving tip is provided: use a 2-wire cable (10/2 for 30 amp or 8/2 for 40 amp) instead of a 3-wire cable since the neutral is not needed.

Goal: Properly wire the hot and ground conductors from the main electrical feed to the HVAC disconnect box.

Tools and materials

  • Electrical wire — Bringing 240V power from the main electrical panel to the disconnect box
  • HVAC Disconnect Box — Providing a local point of disconnection and overcurrent protection for the air condenser unit
  • Screwdriver — Tightening the terminal screws within the disconnect box
  • Wire nuts/caps — Safely capping off the unused neutral (white) wire
  • Wire strippers — Removing the insulation from the ends of the electrical wires before making connections

What they say

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here is our liquid tight running up to the disconnect here is our fuse disconnect guys so as you can see we have the feed coming in it was an 83 RX we capped off the white because the neutral is not needed for these guys you can actually save some money and you can use just a two wire instead of a three wire HVAC typically they have fuses just in case to protect the unit just plugs

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