Choosing the proper wire and cable types, sizes, bases on the need for building houses relies on how much current it will carry, where it will be there and what the local code require.
Most residences have a cable - wires of different meters (thickness) for different circuits and different types of cable based on where it is installed.
Two basic questions determine the choice of which type to use: how much current will the circuit carry, and where will the cable be located? Licensed electricians adore these questions.
Many carpenters and homeowners establish simple circuits or repair old ones, so knowing which cable to use is important.
When in doubt, engage a professional electrician or have one evaluate your work.
Ask your local building authority for approvals or permits.Heavier loads, heavier cables
One, some terminology.
While "wire" and "cable" are commonly used interchangeably, a wire actually refers to a single electrical conductor.
When many wires are bundled together, what you have is a cable.
No matter what sort of cable you select, the gauge of the individual wires will decide how much current the cable can safely handle.
The lightest gauge used in household circuits is 14 Ga. , which is rated at 15 amps (lights and other electrical devices normally utilize lighter meters instead of 14).
(lights and other electrical equipment typically use lighter meters instead of 14).
The heavier the wire, the more current it can handle: 12 Ga. For 20-AMP circuits; 10 Ga.
is a 30 amp circuit; and 8 grams.
is a 40-amp circuit.
Older branch circuits may use aluminum conductors.
Aluminum may be used for bulk circuits like a home's SE wire.
See if this is allowed with your local building official.
cable wire
Wire and cable are used to transmit power, data, and signals.
Wires are stranded in a rope-like cable (at least two in each group).
Insulated wires are twisted around a center. Insulates well.
Cable types: SYV: polyethylene-insulated RF coaxial wire
SYWV(Y): Physically foamed polyethylene insulated cable TV system cable, video (RF) coaxial cable for closed-circuit monitoring and cable TV engineering.
Special cable structure for SYWV (Y), SYKV, and broadband Network: (BNC) Single oxygen-free circular copper wire polyethylene foam (insulation) (tin wire aluminum).
RVV sheathed wire and RVVP shielded wire are used for building intercom, anti-theft alarm, fire protection, and automatic meter reading.
RVVP: Copper core PVC insulated shielded PVC encased flexible cable 300V/300V2-24
core instrument, meter, intercom, monitoring, control installation;
RG: Physically foamed polyethylene insulated access network cable for HFC;
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