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Need to learn fast about Mi cable Need to learn fast about Mi cable #62566 02/19/06 12:07 PM
Joined: May 2004
Posts: 2
J
jjmontey Offline OP
Junior Member
I have a G.C. who is on my back about closing a shaft that has to have a mi cable installed. The mi cable is not going to get to the job site for another month. The print shows 3-#2 and a #8gnd M.I. I believe the #8 is a mistake because the copper sheathing will be the equipment ground. Can I sleeve the shaft with EMT or PVC? If I use EMT, do I have to bond the MI cable to the conduit? Is PVC permitted in the shaft? What size conduit should I use and can I have any bends for a 60-foot vertical run?

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Re: Need to learn fast about Mi cable Need to learn fast about Mi cable #62567 02/19/06 12:32 PM
Joined: Apr 2002
Posts: 7,113
HotLine1 Offline
Member
JJ:
Welcome to ECN.
READ Article 332 of '02 NEC (New Jersey)
You can 'fish' MI, and based on a quick read I did not notice any restrictions on putting it in a raceway

WATCH the bend radius, it's based on the OD, & you probably fall in the '9 times'. You need the OD to decide on conduit size. As to PVC, what is the rating of the 'shaft'

John


John
Re: Need to learn fast about Mi cable Need to learn fast about Mi cable #62568 02/20/06 07:36 AM
Joined: Jan 2003
Posts: 4,391
I
iwire Offline
Moderator
Quote
I believe the #8 is a mistake because the copper sheathing will be the equipment ground.


Is it possible the 8 AWG is actually a reduced neutral?


Bob Badger
Construction & Maintenance Electrician
Massachusetts

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