dispatcher7
New member
I am trying to find out what is different about the different types of wire. Example the difference between size 14 AWG Type TW and size 14 Type THHN. Where can I get this type of information?
what do the wire types mean
- Thread starter dispatcher7
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- Massachusetts
Re: what do the wire types mean
Table 310.13 Conductor Application and Insulations
TW for example is Flame- retardant, moisture -resistant thermoplastic. For dry or wet locations, with a maximum operating temp of 60 C
THHN is Flame- retardant, heat-resistant thermoplastic for dry or damp locations with a maximum operating temp of 90 C
Table 310.13 Conductor Application and Insulations
TW for example is Flame- retardant, moisture -resistant thermoplastic. For dry or wet locations, with a maximum operating temp of 60 C
THHN is Flame- retardant, heat-resistant thermoplastic for dry or damp locations with a maximum operating temp of 90 C
- Location
- Lockport, IL
- Occupation
- Semi-Retired Electrical Engineer
Re: what do the wire types mean
The letters describe the type and rating of the insulation. The ?T? stands for ?thermoplastic.? It is good for a 60 degree C temperature rise, with an ambient temperature of 30C. The ?H? stands for ?add one measure of heat.? It means that you add 15 degrees C to the temperature rating. So a ?T? is good for 60C, a ?TH? is good for 75C, and a ?THH? is good for 90C. The ?W? stands for ?wet,? and tells you the conductor can withstand a wet environment.
The ?AWG? stands for ?American Wire Gauge.? The bigger the number, the smaller the wire. For example, most household circuits will use a #12. A #14 is smaller than this, and a #10 is bigger. The size of the wire is related to the amount of current it can safely carry. The larger the wire, the more current.
The letters describe the type and rating of the insulation. The ?T? stands for ?thermoplastic.? It is good for a 60 degree C temperature rise, with an ambient temperature of 30C. The ?H? stands for ?add one measure of heat.? It means that you add 15 degrees C to the temperature rating. So a ?T? is good for 60C, a ?TH? is good for 75C, and a ?THH? is good for 90C. The ?W? stands for ?wet,? and tells you the conductor can withstand a wet environment.
The ?AWG? stands for ?American Wire Gauge.? The bigger the number, the smaller the wire. For example, most household circuits will use a #12. A #14 is smaller than this, and a #10 is bigger. The size of the wire is related to the amount of current it can safely carry. The larger the wire, the more current.
Re: what do the wire types mean
To add to what Charlie said, R is for thermoset rubber, and -2 is another heat measure. For example a cable listed RHW-2 is ruber insulated, 90 degree, wet or dry locations.
X is another designation for for cross-linked thermoset plastic for example XHHW-2 would be Cross-Linked synthetic polymer rated for 90 degrees is wet locations.
It is a little confusing at times. But genneraly the first letter or two designate the insulation type followed by heat a water designation, but not always. For example FEP and FEPB is Fluorinated Ethylene Propylene (Teflon) 90 and 200 degree respectively, dry and damp locations.
To add to what Charlie said, R is for thermoset rubber, and -2 is another heat measure. For example a cable listed RHW-2 is ruber insulated, 90 degree, wet or dry locations.
X is another designation for for cross-linked thermoset plastic for example XHHW-2 would be Cross-Linked synthetic polymer rated for 90 degrees is wet locations.
It is a little confusing at times. But genneraly the first letter or two designate the insulation type followed by heat a water designation, but not always. For example FEP and FEPB is Fluorinated Ethylene Propylene (Teflon) 90 and 200 degree respectively, dry and damp locations.
- Location
- Lockport, IL
- Occupation
- Semi-Retired Electrical Engineer
Re: what do the wire types mean
Oh, and the "N" in "THHN" stands for a neoprene jacket.
Oh, and the "N" in "THHN" stands for a neoprene jacket.
- Location
- Lockport, IL
- Occupation
- Semi-Retired Electrical Engineer
Re: what do the wire types mean
Oops! Yes, it is nylon. Should not have gone from memory, for tis the memory that is gone.
Oops! Yes, it is nylon. Should not have gone from memory, for tis the memory that is gone.
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
Re: what do the wire types mean
Too much radiation, Charlie.
(inside, joke Charlie and I both worked in the navy nuclear program)
Too much radiation, Charlie.
(inside, joke Charlie and I both worked in the navy nuclear program)
charlie
Senior Member
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- Indianapolis
Re: what do the wire types mean
I hope you both wore your dosimeter everyday. I had mine on all the time with the nuclear weapons.
I hope you both wore your dosimeter everyday. I had mine on all the time with the nuclear weapons.
ryan_618
Senior Member
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- Salt Lake City, Utah
Re: what do the wire types mean
Do you mean my work books are THWN?
charlie
Senior Member
- Location
- Indianapolis
Re: what do the wire types mean
Who invited Ryan to this dog fight? LOL and LMAO
Who invited Ryan to this dog fight?
LOL and LMAO
ryan_618
Senior Member
- Location
- Salt Lake City, Utah
Re: what do the wire types mean
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