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Current carrying conductors

P

Preacher84

Member
Location
Hagerstown MD U.S.
Occupation
Journeyman Electrician
How many current carrying conductors can go inside a 1” EMT pipe, with 20 amp breakers? And does it make a difference if the conductors are stranded as opposed to solid?
 
augie47

augie47

Moderator
Staff member
Location
Tennessee
Occupation
State Electrical Inspector (Retired)
Fair number of variables... insulation type, ambient, length etc.
But assuming THWN-2 insulation and greater than 24" you can get 16 #10s. If all were current carrying the derating would be 50% so the 90° adjustment would be 20 amps.
Solid or stranded would be the same.
 
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