fbhwt
Electrical Systems Inspector
- Location
- Spotsylvania,Virginia
- Occupation
- Electrical Systems Inspector
Where may I find information on proper operating procedure of maintenance support equipment in hazardous locations?
Electric scissor lift in hazardous location
- Thread starter fbhwt
- Start date
- Status
- Location
- Mission Viejo, CA
- Occupation
- Professional Electrical Engineer
Re: Electric scissor lift in hazardous location
The NEC does not address this. While 500.1 may at first imply Arts 500-504 apply to this equipment, it must be interpreted in light of the definition of electrical and electronic equipment in Section 500.2; i.e., the Articles apply to ?installations? not to portable or transportable (including mobile) equipment. I don?t know of any other NFPA Standard that applies.
The definition in 500.2 does reference the ISA 12 series of standards, but they don?t apply to the class of equipment you refer to. (I have a calculator that is specifically listed for Class I, Division 2, Groups A, B, C, and D. In my opinion the listing is gross overkill for Divsion 2 only.)
The American Petroleum Institute (API) RP540 also has a very brief set of guidelines for portable but not self-propelled equipment.
My personal opinion is the equipment you mentioned may be used in Division 2 locations fairly routinely but I would have someone very familiar with classified location principles to look it over first. With Division 1 locations, I?d want a Nationally Recognized Testing Laboratory (NRTL) to certify it.
The NEC does not address this. While 500.1 may at first imply Arts 500-504 apply to this equipment, it must be interpreted in light of the definition of electrical and electronic equipment in Section 500.2; i.e., the Articles apply to ?installations? not to portable or transportable (including mobile) equipment. I don?t know of any other NFPA Standard that applies.
The definition in 500.2 does reference the ISA 12 series of standards, but they don?t apply to the class of equipment you refer to. (I have a calculator that is specifically listed for Class I, Division 2, Groups A, B, C, and D. In my opinion the listing is gross overkill for Divsion 2 only.)
The American Petroleum Institute (API) RP540 also has a very brief set of guidelines for portable but not self-propelled equipment.
My personal opinion is the equipment you mentioned may be used in Division 2 locations fairly routinely but I would have someone very familiar with classified location principles to look it over first. With Division 1 locations, I?d want a Nationally Recognized Testing Laboratory (NRTL) to certify it.
petersonra
Senior Member
- Location
- Northern illinois
- Occupation
- Semi-retired engineer
Re: Electric scissor lift in hazardous location
The answer is that you can use any equipment you want in a hazardous area, including welding equipment if you get a hot work permit and make sure it is safe to do so.
I think for most equipmnent you are going to have a hard time finding anything certified as suitable for use in a hazardous area, especially class 1, division 1 areas.
The answer is that you can use any equipment you want in a hazardous area, including welding equipment if you get a hot work permit and make sure it is safe to do so.
I think for most equipmnent you are going to have a hard time finding anything certified as suitable for use in a hazardous area, especially class 1, division 1 areas.
fbhwt
Electrical Systems Inspector
- Location
- Spotsylvania,Virginia
- Occupation
- Electrical Systems Inspector
Re: Electric scissor lift in hazardous location
Thanks for the info,the area in question is where inks and solvent are stored and mixed. I work for a printing company. There are explosion proof lights I need to work on time to time. What we have done in the past is to ventilate while monitoring LEL. I was wondering if someone knew if there were specific guide lines in this situation.
Thanks for the info,the area in question is where inks and solvent are stored and mixed. I work for a printing company. There are explosion proof lights I need to work on time to time. What we have done in the past is to ventilate while monitoring LEL. I was wondering if someone knew if there were specific guide lines in this situation.
- Location
- Mission Viejo, CA
- Occupation
- Professional Electrical Engineer
Re: Electric scissor lift in hazardous location
If it is an infrequent activity, then what you are describing is fine and generally consistent with the "other Bob's" recommendation. The "hot work permit", "documents" the location has been temporarily reclassifed per 500.4(A)
If it is a frequent activity, then what I said originally applies.
If it is an infrequent activity, then what you are describing is fine and generally consistent with the "other Bob's" recommendation. The "hot work permit", "documents" the location has been temporarily reclassifed per 500.4(A)
If it is a frequent activity, then what I said originally applies.
Re: Electric scissor lift in hazardous location
Sounds like you got the right idea. You are controlling the hazard with ventilation. If you don't do anything else this is what will save you - assuming you are changing the room air enough times - there are formulae in the front of ACGIGH for this situation. You are confirming the ventilation is working by checking for LEL - assume you are operating at 10% of the LEL for whatever gas you are calibrating instrument for (commonly methane). This is another good move.
Now to keep the papar freaks happy - you know the guys who say you gotta have a permit
Which one?
You are not welding so a hot work is not appropriate.
It is an area normally occupied so confined space seems odd.
LETS GENERATE ANOTHER USELESS FORM
Ahhhhhhh the heck with it use confined space and scribble it up to fit the need.
The important thing is you are controllng the hazard.
Dan Bentler
Sounds like you got the right idea. You are controlling the hazard with ventilation. If you don't do anything else this is what will save you - assuming you are changing the room air enough times - there are formulae in the front of ACGIGH for this situation. You are confirming the ventilation is working by checking for LEL - assume you are operating at 10% of the LEL for whatever gas you are calibrating instrument for (commonly methane). This is another good move.
Now to keep the papar freaks happy - you know the guys who say you gotta have a permit
Which one?
You are not welding so a hot work is not appropriate.
It is an area normally occupied so confined space seems odd.
LETS GENERATE ANOTHER USELESS FORM
Ahhhhhhh the heck with it use confined space and scribble it up to fit the need.
The important thing is you are controllng the hazard.
Dan Bentler
- Location
- Illinois
- Occupation
- retired electrician
Re: Electric scissor lift in hazardous location
Dan,
In areas where there are flammable gasses, "hot work" permits are often used for any activity that could provide a source of ignition.
Don
Dan,
In areas where there are flammable gasses, "hot work" permits are often used for any activity that could provide a source of ignition.
Don
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