If more than one grounding electrode of the pipe, rod, or plate type are installed, spacing not less than __________ apart is required.
A. twice the length of the longest rod
B. 21?2 ft
C. 6 ft
D. 8 ft
C. 6 ft
Trades & Technology
You might also like to view...
Is a roof cover board required above insulating concrete or foamed concrete insulation before installing the roof membrane?
What will be an ideal response?
Trades & Technology
A type of concrete that can be placed without the use of a form is _____ concrete
a) mass b) roller-compacted c) preplaced d) heavyweight
Trades & Technology
The grinding machine table:
A) Provides support for the grinding spindle B) Is for the support of the grinding machine saddle C) Is a stationary support D) Supports the workpiece, usually on a chuck, for grinding
Trades & Technology
What is forced convection? How does it differ from natural convection? Is convection that is caused by winds forced or natural convection?
What will be an ideal response?
Trades & Technology