bcollins
Member
- Location
- Schererville, Indiana
I am being told that I have to use 2 inch pipe to run #2 / 3 wire 480 volt 3 phase. I am currently trying to run 1 1/4 pipe. Is this true?
pipe size?
- Thread starter bcollins
- Start date
- Status
- Location
- Lockport, IL
- Occupation
- Retired Electrical Engineer
Generally, it depends on the type of insulation system and the type of conduit. The tables are all in Annex C. From a quick look through, it seems to me that you can get 3 #2 wires in a 1.25 inch conduit, for many combinations of insulation and conduit.
But you are talking about a single cable with insulation covering three conductors. That is not covered by the tables. Therefore, what you need to find out is the cross-sectional area of your cable.
Refer to the Chapter 9 Tables, notably Table 1 and its notes (5) and (9).
But you are talking about a single cable with insulation covering three conductors. That is not covered by the tables. Therefore, what you need to find out is the cross-sectional area of your cable.
Refer to the Chapter 9 Tables, notably Table 1 and its notes (5) and (9).
JohnJ0906
Senior Member
- Location
- Baltimore, MD
Who's telling you? I worked once under a foreman who liked to oversize conduit for long runs, or more than 180 deg. of bends, so pulling was easier.
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