Which of the following is an NEC Article 427 requirement for the installation of electrical heat-tracing cables on pipe and vessels in unclassified areas?
a. The external surfaces of any equipment that operates at temperatures above 100°F (38°C)
must be physically guarded, isolated, or thermally protected.
b. Branch circuits and overcurrent devices supplying the equipment must be sized at no less
than 100 percent of the total heater load.
c. The heating cable cannot be allowed to make direct contact with the pipe or vessel.
d. The presence of electric heating equipment must be identified using permanent caution
signs or markings at the specified intervals.
d. The presence of electric heating equipment must be identified using permanent caution
signs or markings at the specified intervals.
You might also like to view...
What is the main difference between telephone sales and direct sales?
What will be an ideal response?
Intrapreneurs are entrepreneurs who develop new businesses in the context of large
organizations.
Indicate whether the statement is true or false.Name this construction tool shown in the below figure
A) bullfloat
B) edger
C) darby
D) trowel
A CAD operator needs to calculate the total cost of the wall switches for a building with 7 floors. On each floor, there are 16 single-pole, single-throw switches at $1.82 each; 15 single-pole, double-throw switches at $2.25 each; and 13 doublepole, double-throw switches at $3.37 each. What is the cost of the switches for the entire building?
What will be an ideal response?