For a 208 volt HID roadway luminaries with supplemental fusing in the base, does the NEC require the fuseholders to be two pole type? Would two separate single pole types be permitted? These are the type similar to Littlefuse inline watertight fuseholders. My concern is the possibility of backfeed if the branch circuit disconnect is not turned off, for maintenance or testing.
In Line fuseholders
- Thread starter ekbrunn
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russ
Senior Member
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- Burbank IL
Re: In Line fuseholders
The inline fuses are not a code requirement. When they are installed it's commonly done with individual inline fuse holders.
If anybody else knows of something I'm missing, believe me they will let us know.
[ January 27, 2004, 05:53 PM: Message edited by: russ ]
The inline fuses are not a code requirement. When they are installed it's commonly done with individual inline fuse holders.
If anybody else knows of something I'm missing, believe me they will let us know.
[ January 27, 2004, 05:53 PM: Message edited by: russ ]
flightline
Senior Member
Re: In Line fuseholders
Depending on the size of the pole and handhole, from a purely practical standpoint, I would suggest single pole styles, just because trying to stuff all the stuff back into the pole can be , at times, "difficult". Again, that's not the code answer, just a practical one. While I would never expect anyone else to do this, part of the standard spec at our facility calls for a fused pullout in a custom fabricated enclosure, outside of the pole body itself. That way, you don't risk injury or the like, and do so prior to entering the pole itself. [But nobody has money for such things in the real world].
Depending on the size of the pole and handhole, from a purely practical standpoint, I would suggest single pole styles, just because trying to stuff all the stuff back into the pole can be , at times, "difficult". Again, that's not the code answer, just a practical one. While I would never expect anyone else to do this, part of the standard spec at our facility calls for a fused pullout in a custom fabricated enclosure, outside of the pole body itself. That way, you don't risk injury or the like, and do so prior to entering the pole itself. [But nobody has money for such things in the real world].
luke warmwater
Senior Member
Re: In Line fuseholders
We install the single type and I've never seen a 2-pole type. I'll have to check the supplier if one is available.
It amazes me that for all the more the things cost, very few people use them.
We install the single type and I've never seen a 2-pole type. I'll have to check the supplier if one is available.
It amazes me that for all the more the things cost, very few people use them.
Re: In Line fuseholders
We use the water tight in-line fuse holders at our plant for our two phase 480v. lighting. We connect the holder end to the fixture and the cap to line, that way we can disconnect both fuses and then pull the fuses out in order to work on the light or change a fuse. I do worry about someone not taking both fuse holders apart before taking a fuse out.
We use the water tight in-line fuse holders at our plant for our two phase 480v. lighting. We connect the holder end to the fixture and the cap to line, that way we can disconnect both fuses and then pull the fuses out in order to work on the light or change a fuse. I do worry about someone not taking both fuse holders apart before taking a fuse out.
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