working clearance
- Thread starter rey-man
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jtester
Senior Member
- Location
- Las Cruces N.M.
Re: working clearance
It would appear that 110.34(A) would apply, even though it reads like the equipment is inside. Note that the exposed live parts are energized at the higher voltages. Also, 110.31 talks about clearances from fences to equipment.
I am curious what kind of equipment are you refering to? Most breakers, regulators, LTC,s, that I am used to don't have exposed high voltage parts unless they are elevated.
Jim T
It would appear that 110.34(A) would apply, even though it reads like the equipment is inside. Note that the exposed live parts are energized at the higher voltages. Also, 110.31 talks about clearances from fences to equipment.
I am curious what kind of equipment are you refering to? Most breakers, regulators, LTC,s, that I am used to don't have exposed high voltage parts unless they are elevated.
Jim T
charlie
Senior Member
- Location
- Indianapolis
Re: working clearance
Table 110.34(A) Minimum Depth of Clear Working Space at Electrical Equipment
Table 110.34(A) Minimum Depth of Clear Working Space at Electrical Equipment
- Location
- Lockport, IL
- Occupation
- Retired Electrical Engineer
Re: working clearance
The voltage and KVA ratings are not relevant to the question of working clearance distances. The answer is 6 feet, or 8 feet, or 10 feet, depending on what is in front of the equipment. See the table that jtester and "The Other Charlie" have given you.
[ December 22, 2004, 10:14 AM: Message edited by: charlie b ]
The voltage and KVA ratings are not relevant to the question of working clearance distances. The answer is 6 feet, or 8 feet, or 10 feet, depending on what is in front of the equipment. See the table that jtester and "The Other Charlie" have given you.
[ December 22, 2004, 10:14 AM: Message edited by: charlie b ]
Re: working clearance
I wish I could post a picture. I just visited a site with a 75KVA transformer mounted sideways on the pad due to a couple of bollards. If they had set the transformer going the right way on the pad, they wouldn't have been able to open the doors
I'm supprised the POCO let it go.
P.S. If it is a utility transformer, they may have additional requirements. For example, it may have to be accessible to a service truck.
STeve
[ December 22, 2004, 10:51 AM: Message edited by: steve66 ]
I wish I could post a picture. I just visited a site with a 75KVA transformer mounted sideways on the pad due to a couple of bollards. If they had set the transformer going the right way on the pad, they wouldn't have been able to open the doors
I'm supprised the POCO let it go.P.S. If it is a utility transformer, they may have additional requirements. For example, it may have to be accessible to a service truck.
STeve
[ December 22, 2004, 10:51 AM: Message edited by: steve66 ]
charlie
Senior Member
- Location
- Indianapolis
Re: working clearance
If it was an electric utility's transformer, it was probably a dead front transformer. They would need room to operate a shotgun type hotstick while standing in front of the transformer.
If it was an electric utility's transformer, it was probably a dead front transformer. They would need room to operate a shotgun type hotstick while standing in front of the transformer.
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