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Q: What is the minimum temperature rating of TFFN wire?
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What is the Minimum branch circuit wire size in a dwelling?

The minimum size home wiring is #14 AWG, the rating for that size wire is 15 amps.


What is the minimum branch-circuit wire size installed in a dwelling?

The minimum size home wiring is #14 AWG, the rating for that size wire is 15 amps.


How do you figure your celsius rating for wire sizing?

The ambient insulation rating of wires and cables is imprinted on the wire and cables. The labels on the cables will tell you the wire size, number of conductors and temperature rating of the wires and cables. The higher the cable and wire temperature ratings the higher the amount of current that is allowed to be drawn by the wire and cable according to the electrical code book.


What is the minimum volt rating of wire used in a 3 phase 4160 volt phase to phase system?

5000 volt


What is nmb wire?

The NM stands for Non-Metallic, and the B is the temperature rating of the wire which is 90 degrees C or 194 degrees F. The common name for NMB wire is Romex.


What is the minimum size AWG copper conductor permitted for conductors with a 0 to 2000v voltage rating?

When you talk of voltage, you should be thinking of the insulation factor of the wire. By the same token when you talk of wire size, it is based on the amperage the wire is required to handle.


What does 40 C mean on a circuit breaker?

Answer"40 C" means 40 degrees CENTIGRADE temperature rating.The breaker is rated to warm up to this temperature while in use without risk of fire or breakdown. It should not be used in such a way that it exceeds that temperature.Note that wires connected to the breaker must have an equal or higher temperature rating of its insulation. However, when the wire insulation rating is greater than the breaker rating, the wire's capacity must be determined using the breaker's lower temperature rating.For example:If the breaker is 400C and the wire is 400C, the wire capacity would be based on 400CIf the breaker is 400C and the wire is 600C, the wire capacity would be based on 400CIf the breaker is 600C and the wire is 900C, the wire capacity would be based on 600CI don't believe this to be true... The breaker is tested to and calibrated at the 40c rating. (This has more to do with ambient temp. than the way the breaker is being used) In a case where the temp. may exceed this rating you may trip before seeing the current the breaker is rated. The wire is typically rated @ 75c & 90c and the connection point on the breaker or the lug would be rated @ 60cThe above paragraph is correct It is the ambient rating of the breaker calibrated to trip at that temperature set point. In cold climates this has to be watched very closely. On a -20 C day, on breakers that are exposed to the elements, a breaker on the overload portion of the tripping mechanism may not trip until the current reaches one and a half times the handle rating.


What is the typical rating of a hot wire relay contacts?

The typical rating of a hot wire relay contacts is 35 amp


What is a typical rating of a hot wire relays contact?

The typical rating of a hot wire relay contacts is 35 amp


What is more important for amperage rating wire size or insulation temperature rating?

Wire size determines how much current can be safely conducted. Insulation type and rating determines other factors, such as where the wire can be used and maximum voltage. It should be noted that the high voltage lines that are hanging from the really large electrical towers are among a class of wires that have NO insulation around the outside of the wire. They are instead, connected to the towers with large insulators that prevent electrical energy from being lost through the towers.


Can aluminum 600v wire work a 40 amp breaker?

Wire size is rated by Amperes of current. You did not mention the wire size of the aluminum wire, so there is no way to answer your question. The voltage rating is more a rating of how good the insulation around the wire is.


What is the minimum wire size used in a commercial building?

The minimum size wire that engineers spec for industrial and commercial installations is #12 and it usually is stranded not solid wire.