malachi constant
Senior Member
- Location
- Minneapolis
Existing maintenance building, being expanded to turn into a manufacturing building. Hazardous materials (Class I flammable liquid - styrene) will be in one area of the facility.
The Owner commissioned a fire protection & life safety code report. I'm meeting with the fire marshal, architect, Owner, and report's author tomorrow, and to prepare for the meeting I am today trying to wrap my head around the report and what I know of articles 500/501/502. If you have a minute to skim over this post and provide input it is appreciated.
The report states:
1. Facility shall be classified as an H-2 occupancy.
2. Explosion control not required.
3. 1 cfm of ventilation.
4. Standby/emergency power required for ventilation, alarm, detection, etc.
5. Standby power is NOT required for fail-safe engineered systems.
6. Classified electrical equipment is required in areas where flammable liquids are stored, handled, dispensed or mixed. Possible classified electrical locations include:
--a. Class 1 Div 1 within 3' of vent & fill openings
--b. C1D2 within 3-5' of vent & fill openings
--c. C1D2 within 5' of edge of any pumps etc; and up to 3' above floor and w/in 25 horizontally of the edge of such devices
--d. C1D1 throughout pits
--e. C1D1 within 5' of process equipment where flammable vapor/air mixtures could exist under normal operations
--f. C1D2 within 5-8' of process equipment where flammable vapor/air mixtures could exist under normal operations, and up to 3' above the floor within 5-25' horizontally from edge of such equipment.
7. Bonding of vessels containing class 1 liquids
The mechanical system is being reconfigured to provide 1 cfm continuously throughout the facility. Ventilation openings are within 12" of finished floor. We are adding an emergency generator to back up the critical HVAC (and fire alarm panel). There is a trench drain but no pits requiring electrical.
We have the understanding that there is only one pump & tank that contains styrene, and although it is on wheels it will be confined to a fairly small area at the head of an assembly line. We propose keeping all electrical out of this area with the exception of what is necessary to feed this and related assembly line equipment. The connection to the styrene equipment will be by drop cord, I assume it should be C1D1 and include a ground (which I assume takes care of the bonding requirement). There are a few other pieces of equipment requiring electrical connections in the general vicinity of this, I plan to note them as C1D1 as we do not know the precise location of the styrene at all times. The rest of the facility we will not do anything abnormal - standard GFI, 18" or higher.
Does this sound like a reasonable approach? Anything I am missing or should be asking?
EDIT: There are a couple motorized overhead doors over this area. My reading of the code summary is the door motors can be standard wiring, as can the wall-mounted controllers, provided they are over 36" AFF. Ditto the lights.
The Owner commissioned a fire protection & life safety code report. I'm meeting with the fire marshal, architect, Owner, and report's author tomorrow, and to prepare for the meeting I am today trying to wrap my head around the report and what I know of articles 500/501/502. If you have a minute to skim over this post and provide input it is appreciated.
The report states:
1. Facility shall be classified as an H-2 occupancy.
2. Explosion control not required.
3. 1 cfm of ventilation.
4. Standby/emergency power required for ventilation, alarm, detection, etc.
5. Standby power is NOT required for fail-safe engineered systems.
6. Classified electrical equipment is required in areas where flammable liquids are stored, handled, dispensed or mixed. Possible classified electrical locations include:
--a. Class 1 Div 1 within 3' of vent & fill openings
--b. C1D2 within 3-5' of vent & fill openings
--c. C1D2 within 5' of edge of any pumps etc; and up to 3' above floor and w/in 25 horizontally of the edge of such devices
--d. C1D1 throughout pits
--e. C1D1 within 5' of process equipment where flammable vapor/air mixtures could exist under normal operations
--f. C1D2 within 5-8' of process equipment where flammable vapor/air mixtures could exist under normal operations, and up to 3' above the floor within 5-25' horizontally from edge of such equipment.
7. Bonding of vessels containing class 1 liquids
The mechanical system is being reconfigured to provide 1 cfm continuously throughout the facility. Ventilation openings are within 12" of finished floor. We are adding an emergency generator to back up the critical HVAC (and fire alarm panel). There is a trench drain but no pits requiring electrical.
We have the understanding that there is only one pump & tank that contains styrene, and although it is on wheels it will be confined to a fairly small area at the head of an assembly line. We propose keeping all electrical out of this area with the exception of what is necessary to feed this and related assembly line equipment. The connection to the styrene equipment will be by drop cord, I assume it should be C1D1 and include a ground (which I assume takes care of the bonding requirement). There are a few other pieces of equipment requiring electrical connections in the general vicinity of this, I plan to note them as C1D1 as we do not know the precise location of the styrene at all times. The rest of the facility we will not do anything abnormal - standard GFI, 18" or higher.
Does this sound like a reasonable approach? Anything I am missing or should be asking?
EDIT: There are a couple motorized overhead doors over this area. My reading of the code summary is the door motors can be standard wiring, as can the wall-mounted controllers, provided they are over 36" AFF. Ditto the lights.
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