minimum cover requirements
- Thread starter C. Rossi
- Start date
- Status
- Location
- Logan, Utah
Welcome to the forum.
Could you clarify the question?
As written the question can't really be answered correctly.
Chris
Could you clarify the question?
As written the question can't really be answered correctly.
Chris
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
The cover requirement will vary depending on conditions. If it is subject to vehicular traffic then 24" for non dwelling. If it is a dwelling then it could be 18" with vehicular traffic.
So-- what is your specific situation or is this just a general question.
Reply
Reply
Sorry for the confusion. My question comes from a practice test in the book, Stallcup's Journeyman Electrician's Study Guide.
The question verbatim is:
Rigid nonmetallic conduit shall be installed a least ________ in. below the top surface of finished grade.
A. 6
B. 12
C. 18
D. 24
I doesn't mention it's condition. So, I take it as minimum requirement for any and all conditions. Which would be 0 in. provided that it is under a building Table 300.5. But to pick an answer from those choices I would pick B. 12 in. with the condition that it is in a trench below 2 in thick concrete. What do you think? Really it's a bad question if they don't give you a condition.
The answers are published in another book, which I don't have. So, Occasionally I come across a question that can be ambiguous.
C.Rossi
Reply
Sorry for the confusion. My question comes from a practice test in the book, Stallcup's Journeyman Electrician's Study Guide.
The question verbatim is:
Rigid nonmetallic conduit shall be installed a least ________ in. below the top surface of finished grade.
A. 6
B. 12
C. 18
D. 24
I doesn't mention it's condition. So, I take it as minimum requirement for any and all conditions. Which would be 0 in. provided that it is under a building Table 300.5. But to pick an answer from those choices I would pick B. 12 in. with the condition that it is in a trench below 2 in thick concrete. What do you think? Really it's a bad question if they don't give you a condition.
The answers are published in another book, which I don't have. So, Occasionally I come across a question that can be ambiguous.
C.Rossi
cripple
Senior Member
- Location
- Santa Fe, New Mexico
minimum cover requirements
Since no condition is noted I would have picked C 18 inches, which is least cover before modified by the requirements listed below the first column.
Since no condition is noted I would have picked C 18 inches, which is least cover before modified by the requirements listed below the first column.
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