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The ampacity of NO 12 aluminum wire with RHW insulation installed in a raceway that has 19 other wires is what?
Wiki User
∙ 10y ago
A #12 copper conductor with an insulation factor of 90 degrees C is rated at 20 amps.
A #12 aluminium conductor with an insulation rating of 90 degrees C is rated at 15 amps.
These conductors ratings only applies to three conductors in a raceway. To apply the derate to the conductor requires the size of the raceway.
From 7 to 24 conductors in a raceway, both aluminium and copper conductor's ratings have to be reduced by .70, so 15 amps x .7 = 10.5 amps and 20 amps x .7 = 14 amps respectively.
Wiki User
∙ 10y ago
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∙ 13y agoCode test question.
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Can Wiremold be use as a ground in short runs?
No. The individual pieces are not classed as a continuous raceway. A ground wire has to be installed from the source voltage to the load to comply with the electrical code rules.
Do you derate for a three phase line and load conductors in the same conduit?
Yes, there will be a de-rate applied to this type of installation. In the electrical code book the amperage rating of conductors is for allowable ampacities for not more than three copperconductors in raceway or cable. This is based on an ambient temperature of 30 degrees C. If the ambient temperature of the conductors where the raceway is installed is over 30 degrees C the conductor amperages have to be reduced. Where the number of conductors are from 4 to 6 conductors in a raceway, the conductors amperage has to be reduced by .8
What is the largest size solid conductor permitted to be installed in a raceway?
10 AWG can be solid. 8 AWG and larger should be stranded. 2008 NEC 310.3 2011 NEC 310.106(C)
What is the largest following ampacities that is allowed in a raceway containing thirty-six No10 RHW-2 copper wires in an area where the ambient temperature is 30 C or 86 F?
If a cable insulation is described as RHW, you would be able to use the cable for what maximum temperature? A. 194°FB. 140°FC. 86°FD. 167°F
Can a three phase circuit be installed in the same conduit or in different conduits?
The conductors of any three phase circuit must be run in the same conduit. If the circuit requires a neutral, it must also run with the conductors in the same conduit. (If they were to be run in more than one conduit or raceway, the circuit would not operate properly.)
The ampacity of a No. 12 aluminum wire with RHW insulation installed in a raceway that has 19 other wires is?
A #12 copper conductor with an insulation factor of 90 degrees C is rated at 20 amps. A #12 aluminium conductor with an insulation rating of 90 degrees C is rated at 15 amps. These conductors ratings only applies to three conductors in a raceway. To apply the derate to the conductor requires the size of the raceway. From 7 to 24 conductors in a raceway, both aluminium and copper conductor's ratings have to be reduced by .70, so 15 amps x .7 = 10.5 amps and 20 amps x .7 = 14 amps respectively.
The ampacity of a number 12 aluminum wire with rhw insulation installed in a raceway that has 19 other wires is?
A #12 copper conductor with an insulation factor of 90 degrees C is rated at 20 amps. A #12 aluminium conductor with an insulation rating of 90 degrees C is rated at 15 amps. These conductors ratings only applies to three conductors in a raceway. To apply the derate to the conductor requires the size of the raceway. From 7 to 24 conductors in a raceway, both aluminium and copper conductor's ratings have to be reduced by .70, so 15 amps x .7 = 10.5 amps and 20 amps x .7 = 14 amps respectively.
Five 8 aluminum conductors with THHN insulation are to be routed through a conduit found in a boiler room with an ambient temperature of 75 degree C. What would be the ampacity of each conductor?
#8 aluminum thhn 90 degree wire is rated at 30 amps. Remember to de-rate the wire for more that three conductors in a raceway and the second de-rate for the ambient temperature. Most students miss the de-rate for more that three conductors in a raceway.
You have 3 sets of conduits with 6 500MCM conductors in each one what is your ampacity?
The ampacity of 500 MCM R 90 degree wire is 395 amps. Don't forget to de-rate the wire as there are more that three conductors in a raceway.
Are emergence light wires permitted to be in the same raceway with electrical power wires?
Not usually. The emergency light wiring is using DC voltages and should not be mixed with AC wiring. In some installations the raceway will have barriers. Separation of DC, instrumentation and power cables is allowed if the raceway has barriers installed, and are used for these separate types of wiring.
What is the largest size solid conductor generally permitted to be installed in a raceway?
the unit of admittance (Y) in A.C parallel circuit is
Does the National Electrical Code allow aluminum conductors to be used for underground installation?
You should be able to search the NEC on the internet. However, local code may play a role in whether or not you can use aluminum in an underground application. The other consideration would be whether or not it's listed as a `direct burial wire`, which is to say, is the insulation manufactured to be buried underground. I'm not a big fan of aluminum, and if you're trying to save some money now, you'll most likely end up having to replace it within 5- 10 years. There's also been a lot of house fires attributed to aluminum wiring as it tends to overheat easier than copper. So search the code on the internet, search your local codes and then go with copper direct burial cable anyway. You'll be happier in the long run. But yes, local amendments notwithstanding, the standard NEC does allow aluminum conductors with the proper insulation rating to be used underground. If it is installed in an underground raceway, it must be listed for wet locations, or for direct burial if buried.
If ther are more than conductors in the raceway the ampacity of the conductors must be derated?
Ampacity must be derated depending on the number of conductors and the ambient temperature. In the Canadian Electrical Code Table 5C denotes derating for the number of conductors. 1-3 conductors = 100% load 4-6 conductors = 80% 7-24 conductors = 70% 25-42 conductors = 60% 43 or more conductors = 50%
When was Berlin Raceway created?
Berlin Raceway was created in 1950.
When was Gingerman Raceway created?
Gingerman Raceway was created in 1996.
When did Foxboro Raceway end?
Foxboro Raceway ended in 1997.
When was Foxboro Raceway created?
Foxboro Raceway was created in 1947.
