THHN Electrical Wiring For Your Home

Let’s go over some of the basic details of THHN wiring in your home. THHN is a wire coated in plastic that runs through conduits. It is used for general building purposes, such as residential and commercial wiring. It can operate in a location with a maximum temperature of 194°F or 90℃. It can also operate up to a maximum power capacity of 600 Volts.

The National Electric Code (NEC) recommends and allows THHN to be used in dry locations only, though remember that THWN or THWN-2 qualifies a wire to be used in wet locations, too, and you’ll usually find this wrapped in with your THHN-2 cable.

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The THHN wire consists of a metal-based conductor, and its PVC insulation is flame-retardant, heat-resistant and moisture-resistant. The wire is abrasion-resistant with its nylon jacket or equivalent, as approved by UL LLC.

The standard types of THHN wire include the solid conductor THHN, stranded conductor THHN and aluminum conductor THHN.

  • The solid conductor THHN wire has a solid copper conductor and its AWG is size 14-10.
  • The stranded conductor THHN wire, on the other hand, has an AWG size of 14-4/0 and a stranded conductor of 19 copper strands.
  • The aluminum conductor THHN wire is not made of soft hardened copper but with aluminum. Its specifications are the same as those of the stranded and solid copper THHN wires.

The use of THHN wire within a circuit is identified through a color scheme, a policy based on the NEC. THHN wires have jacket colors available in many colors, as outlined earlier. Further, the THHN wire is also manufactured in a dual-wire rating that is THHN/THWN-2. The THHN-THWN-2 wire is approved for use in wet locations. Most wires produced today use THWN-2 in their dual rating, which operates well in the same temperatures as THHN, up to 90℃. THWN, on the other hand, is only rated up to 75℃.

Things to Look Out for When Wiring THHN Electrical Wire

THHN wire is often used in conduits, raceways, branch circuits, services, and feeders. However, the usage of THHN wiring in your home must first be approved by licensed electricians. It is available at very affordable prices. The nylon coating, however, often makes it difficult to install this wire. Thinner THHN wires can also leak or break down. The PVC jacket can also produce toxic smoke when it is burned by fire, meaning you’ll need to take some precautions.

Here are some electrical wiring tips that can help you ensure energy efficiency within the home.

  1. First, check your appliance wiring and its electrical connection regularly. For instance, you have to check for the proper wiring of small appliances like radio and electric coffee pots, as well as major appliances like electric ranges, ovens and refrigerators. Make sure you’ve installed dryer cords, range cords, ovens and dishwashers properly. Check how these appliances are connected to THHN wires and other electrical wires.
  2. Another tip for THHN wiring in your home is to always keep in mind that there are good and bad electrical wiring connections. Note that a flooded home may pose dangers to your electrical wiring connections. Check whether you are making the proper knots with the electrical wires.
  3. More importantly, make sure that you are following safe and secure electrical connections, especially with the electric meter, electrical disconnects, electric panels and sub-panels. Further, you have to correctly use every electrical wire such as THHN wires.