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Triss [41]
3 years ago
10

Question* Once we have have completed the excavation , constructed forms for our footing and properly installed the rebar , what

is the next step in the construction ?
NEED HELP ASAP
Engineering
1 answer:
DiKsa [7]3 years ago
6 0

Concreting of Column and Bitumen Paint Applications

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Six 15-HP continuous-duty motors are connected to a common 480-volt feeder. The nameplate of each motor indicates: Full load amp
WITCHER [35]

The size conductor that should be used to supply each motor is 12 AWG and the size conductor  that should be used for the feeder conductor is 1/0AWG.

<h3>Size conductor</h3>

a. Using NEC table 430.250

Running connect for 150HP  connected to 460V = 21 A

Conductor size=25% current to 125% current (Increase)

Increase current=21×125/100

Increase current=26.25 A

Nearest standard conductor size using NEC table 310.15(B)(16)=25 A

Since the motor contain NEMA design code the conductor will be choosing from 75° column which means that the size conductor that should be used to supply each motor is 12AWG copper conductors.

b. Feeder conductor

Using NEC section 430.24  plus ampere rating of other motors

Running current

Using NEC Table 430.250

Running current=26.25+21+21+21+21+21

Running current=131.25 A

The value that is greater than 131.25 A  under  75° column of NEC Table 310 (B)(16) is 150 A which means that the size conductor that should be used for the feeder conductor is 1/0 AWG conductors.

Therefore the size conductor that should be used to supply each motor is 12 AWG and the size conductor  that should be used for the feeder conductor is 1/0AWG.

Learn more about size conductor here:  brainly.com/question/14825264

#SPJ1

6 0
2 years ago
The dramatic growth in the number of power data centers, cell towers, base stations, recharge mobiles, and so on is damaging the
Elis [28]

Answer:

True

Explanation:

The statement is true because power data centers, cell towers, base stations, recharge mobiles, and so on emit electromagnetic waves which radiate to the space and causes ozone layer depletion which are harmful to both planet and human in such that it damage the ecosystem and release of ultraviolet rays causes skin cancers in human living in the environment.

7 0
3 years ago
Consider a fully-clamped circular diaphragm poly-Si with a radius of 250 μm and a thickness of 4 μm. Assume that Young’s modulus
Alina [70]

Answer:

Explanation:

find attached the solution to the question

4 0
3 years ago
The snowmobile has a weight of 250 lb, centered at G1, while the rider has a weight of 150 lb, centered at G2. Ifh=3ft, determin
KATRIN_1 [288]

Answer:

See explaination

Explanation:

Please kindly check attachment for the step by step solution of the given problem.

5 0
4 years ago
Harmony in music is characterized by _____.
stira [4]

Answer:

the vertical relationship of pitches.

Explanation:

Harmony can be defined as the use of simultaneous pitches ( two or more tones and notes) or chords played at the same time together.

Harmony in music is characterized by the vertical relationship of pitches. The three most popular and essential forms of harmony are;

1. Diatonic harmony.

2. Non-diatonic harmony.

3. Atonal harmony.

6 0
3 years ago
Read 2 more answers
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