In article 230.43(15) it says you can use LFMC as a service raceway if under 6' and an equipment bonding jumper is used routed with the conduit. My question then is if you are useing this method between the meter and the service disconnect (200a),what exactly would this look like. Do you use bonding bushings at each end of the LFMC, then bond to each enclosure to make sure the fittings are properly bonded or can you just bond as a regular equip. ground to each can? Or bond the 2 fittings with a jumper then to either the meter enclosure or disconnect. It refers back to 250.102 which normaly you would use a jumper from a bonding bushing. I haven't had someone want to use LFMC as a service raceway before. Opinions?
LFMC as service raceway
- Thread starter yetiman
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mdshunk
Senior Member
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- Right here.
There's special LFMC connectors that have a bond lug on them.
EDIT: see the left most connector, and reference attached catalog pages"
http://www.o-zgedney.com/PDF/GB[1].pdf
EDIT: see the left most connector, and reference attached catalog pages"
http://www.o-zgedney.com/PDF/GB[1].pdf
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mdshunk
Senior Member
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- Right here.
I don't know because I don't build services with LFMC. You can run the bonding jumper internal, if you want to, though. I was just pointing out that they make a special fitting to make it a little easier.yetiman said:
romexking
Senior Member
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- Marriottsville, Maryland
It certainly wouldn't do any harm to bond to both enclosures, so go ahead and do it. The extra $3 in material and 15 min may prevent you from either failing an inspection or spending 15 minutes discussing it with the AHJ.
The same goes for 2 ground rods...when in doubt, install 2.
The same goes for 2 ground rods...when in doubt, install 2.
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- Bremerton, Washington
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- Master Electrician
Some areas may not allow this type of wiring method for service entrance conductors.
Bonding of the raceway could be accomplished by bonding one end of raceway. Neutral or (grounded conductor) is also the equipment bonding jumper for both meter and service disconnect. No seperate equipment bondiong jumper for the two enclosures is required unless your neutral (grounded conductor) is not bonded down in the meter and it will be bond at the service enclosure by the main bonding jumper required in 250.28.
But as Tom said sum locations my not permit this wiring method inside the lines of a structure.
But as Tom said sum locations my not permit this wiring method inside the lines of a structure.
Bea, in the #6 post i quoted 250.43, but 230.43 requires to run the bonding jumper through the sealtight and bond both ends of the raceway.Bea said:
(15) Flexible metal conduit not over 1.8 m (6 ft) long or liquidtight flexible metal conduit not over 1.8 m (6 ft) long between raceways, or between raceway and service equipment, with equipment bonding jumper routed with the flexible metal conduit or the liquidtight flexible metal conduit according to the provisions of 250.102(A), (B), (C), and (E) .
Rick
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