Transformer and pedestrians traffic
- Thread starter jado85
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jumper
Senior Member
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- 3 Hr 2 Min from Winged Horses
Assuming you are talking about pad mounted transformers within an enclosure-no live parts exposed- and people, not vehicles, I do not know about any needed distances or barriers that are required.
- Occupation
- Licensed Electrician
I walk by them close enough to touch all the time. Sometimes I do touch them.
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
Heck, I sit on the little one feeding my house and 2 neighbors. It is located at the corner of my front lawn.
- Occupation
- Licensed Electrician
I'm sitting on one having a snack right now.
ha I suppose I can use one as an out door desk! jk
Another question, I think it relvant.
I have dangerous rated panel close to pedestrians, I'm thinking about building a wall only( or do I need a room with roof) to make it a restricted area. would 3hr fire resistance stub walls do the job? based on what I read in the NEC I'll need min 3ft working space.
Another question, I think it relvant.
I have dangerous rated panel close to pedestrians, I'm thinking about building a wall only( or do I need a room with roof) to make it a restricted area. would 3hr fire resistance stub walls do the job? based on what I read in the NEC I'll need min 3ft working space.
- Occupation
- Licensed Electrician
Depending on the voltage you may need more than three feet, but you can build it out of anything you want.
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
Wanna elaborate/clarify?
Yes you need working space, but I am in doubt that a barrier or room is needed. Possibly a sign stating clearances so it does not get blocked.
its 480V, indoor panel where a number of employees walk by it, I'd like to provide some kind of protection incase of Arc flash or fire so that no one is in direct danger.
So metal, wood, or an arc flash blanket are feasible options?
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jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
You can build a block wall if you want to
, but I know of no NEC section requiring it.Seriously, while your intentions are good IMO, it may be considered overkill. That panel is not going to flame up for no reason.
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
jado, is this panel like a 200A 480Y/277V panel used for lighting and such in a room or hallway?
You can build a block wall if you want to
Seriously, while your intentions are good IMO, it may be considered overkill. That panel is not going to flame up for no reason.
oh, I see your point,
its a 480y/277V 800A located by a hallway entrance, fed directly from 1500 KVA XF
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
While larger than I am used to seeing installed in a indoor public area, I still found no provisions requiring a barrier for that equipment.
Note that 70E has provisions for limited access to that area when work is being done.
- Occupation
- Licensed Electrician
I agree with Jumper. The chance of an arc incident are slim unless somebody has the doors open on the panel and is doing something.
The idea is to protect from fires as well as possible arc flash, I'v seen a similar panel burst into flame after a SC on the line side of main CB, was not pretty!
looking through 70E, section 210 talks about Area enclosure but no specifics on materials or clearances.
The safety guys suggested Arc flash blankets placed immediately on the panel door(no clearance) I don't see anything in the code against that if it is removed to do any work on the panel.
I went out for a pass one time, caught it, outran the kids, looked back to see how far ahead of them I was , and got drilled by the one sitting in our yard.
JAP>
ggunn
PE (Electrical), NABCEP certified
- Location
- Austin, TX, USA
- Occupation
- Consulting Electrical Engineer - Photovoltaic Systems
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
ggunn
PE (Electrical), NABCEP certified
- Location
- Austin, TX, USA
- Occupation
- Consulting Electrical Engineer - Photovoltaic Systems
Precisely.
In another related story...
I was playing in a touch football game when a guy running out for a pass ran full tilt into a five foot diameter pecan tree.
Ouch again.
He was wearing an evening gown at the time. It was Mardi Gras.
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