Quality house wiring and insulation forms the pre-requisite of every modern home. The wiring that we use in our homes should meet a variety of factors, apart from meeting up with the requirements. The gauge size of the wire, the insulation used, the conductor and its size, and its sheath, should match the amount of electricity supplied through the outlet. The abbreviations used in the sheath of the cables suggests the tensile strength or the capacity of the wires. While THWN electrical cables are thermoplastic heat and moisture resistant nylon-coated wires, the THHN wires are thermoplastic high heat resistant nylon-coated wires.
While the heat resisting capacity of wires that have 'H' inscribed on them can sustain upto 167F, the ones that have 'HH' inscribed on them can bear upto 194F. The letter 'W' stands for water resistance, and 'N' stands for the nylon coating that makes the wires resistant to gasoline and oil. Moreover, the colour used in the sheath of the wire also signifies its purpose. Improper insulation will not only waste electricity and increase your power bills, but will also put your life at risk.
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