Ask Question
PhysicsPhysics
20 June, 15:41

Several 4-conductor cables are installed in a ladder cable tray without a cover and without exceeding the cable tray fill limit. Each 4-conductor cable comprises four 1/0 AWG THHN copper conductors, each of which is considered current-carrying. What is the allowable ampacity of each 1/0 AWG THHN copper conductor?

+5
Answers (1)
  1. 20 June, 17:16
    0
    Answer: The allowable ampacity is 136 amperes

    Explanation:According to the National Electrical Code the ampacity for insulated conductors of type 1/0 AWG THHN is 170 amperes (from tables) for cables no exceeding 3

    But we are presented with 4 cables in a tray,

    Going by the National Electrical Code where conductors exceeds 3, the allowable ampacity shall be reduced to 80% the of the ampacity gotten from table.

    Hence the allowable ampacity for 4 copper cables of type 1/0 AWG THHN is (80/100) * 170=136 Amperes
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “Several 4-conductor cables are installed in a ladder cable tray without a cover and without exceeding the cable tray fill limit. Each ...” in 📘 Physics if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.
Search for Other Answers
You Might be Interested in
A piece of news published before a rival newspaper can publish it is called a (n).
Answers (2)
In humans, the allele for hemophilia, h, is recessive. which is true of a woman with the genotype XHXh?
Answers (2)
Medical Iodine-131 is a radioactive isotope that is used in the treatment of cancer of the thyroid. The natural tendency of the thyroid to take up iodine creates a pathway for which radiation (ββ - and γγ) that is emitted from this unstable nucleus
Answers (1)
What is its speed when it is very far away from the earth?
Answers (1)
In competition, an athlete threw a flying disk 139 meters through the air. while in flight, the disk traveled at an average speed of 13.0 m/s. how long did the disk remain in the air?
Answers (1)
New Questions in Physics
Monochromatic light passes through two parallel narrow slits and forms an interference pattern on a screen. As the distance between the two slits is decreased, the distance between light bands in the pattern on the screen will a. decrease. b.
Answers (1)
The voltage in a battery is 9 volts. The resistance is 3 ohms. What is the current?
Answers (1)
What do you call a group of cats?
Answers (1)
Justin, with a mass of 30 g, is going down a 8.0 m high water slide. he starts at rest, and his speed at the bottom is 11 m/s. how much thermal energy is created by friction during his descent
Answers (1)
Which of the following is NOT a type (shape) of galaxy? Question 3 options: a) triangular b) irregular c) spiral d) elliptical
Answers (1)
Home » Physics » Several 4-conductor cables are installed in a ladder cable tray without a cover and without exceeding the cable tray fill limit. Each 4-conductor cable comprises four 1/0 AWG THHN copper conductors, each of which is considered current-carrying.
Sign Up Forgot Password?