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Joined: Dec 2002
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does anyone have a definition of a Supplementary overcurrent protection/device ??????
Thanks in advance..
WOC
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Joined: Mar 2001
Posts: 333
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240-10 would suggest an internal/integral fuse/breaker in an appliance would be one.
Steve
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Joined: Nov 2002
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I remember some metal halide light fixtures we replaced once that had fuses in the box with the ballast. Would that qualify?
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Joined: Dec 2002
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Thanks for the help. It came up in article 240.24(E), under the heading of 'Location on Premises'.. specifically, in bathrooms.
Not Located in Bathrooms. Overcurrent protection devices ,OTHER THAN SUPPLEMENTAL OVERCURRENT PROTECTION, shall not be located in the bathrooms of dwelling units... So my question what exactly qualifies as a supplemental overcurrent protection/device. tanks in advance
WOC
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Joined: Apr 2002
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ga.sparky — It’s worth noting that supplementary overcurrent protection has application in light fixtures to prevent one ballast fault taking out an entire branch circuit and plunging a critical area into darkness. 300V fuse designed for {120-277V} highbay and fluorescent lighting: http://www.bussmann.com/library/bifs/2033.PDF Submersible fuseholder for use in subsurface {even flooded} applications for service continuity in outdoor area lighting: http://www.bussmann.com/library/bifs/2127.PDF
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Joined: Feb 2003
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gasparky 56:
indeed i ran into alot of them with 277 volts with flourescent lamps especally with slimline units they have socd ( summentover curret device) and quite few of hids also have fuse on them espcally near full load on line and it also noted that on crictal lines it will have fuse there near ballast but i dont have the excat nec code numeber with me but genrally it is common practice and also outside parking lot lightfixure also have fuse too i just replace quite few of them not too long ago it came with 120/208 volts line 3 ph with 60 amp line with get this # 1 wire (copper !!)that the reason they put fuse on hevey loaded line ditto with city street light i see simuaur set up using same arrangement with parking lot lights too
merci marc
Pas de problme,il marche n'est-ce pas?"(No problem, it works doesn't it?)
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Joined: May 2001
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Supplemental Protectors are not intended to provide branch circuit protection and are limited to applications where branch circuit protection is already provided or is not required.
Supplemental Protectors, according to their scope of evaluation, are not evaluated for performance to provide branch circuit protection.
This consideration alters the content in the performance requirements and in general would allow for more flexibility in the requirements than what would be allowed for a device being evaluated for branch circuit protection.
Look for the proper markings on Din-Rail Circuit Breakers to properly identify what is a Circuit Breaker and what is a supplementary protector.
Here are the CSA & UL Standards:
Branch Circuit Protection: Products evaluated according to the UL 489 Standard for molded case circuit breakers are listed for branch circuit protection. Branch circuit protection must be provided for the conductors supplying utilization equipment in accordance with the NEC.
On OEM products, circuits exiting the control panel must be considered as branch circuits, as well as circuits supplying receptacles in the control panel.
The CSA (Canadian Standards Association) C22.2 No. 5.1 standard closely corresponds to UL 489. Products evaluated according to this CSA standard are intended to protect branch circuits in accordance with the Canadian Electrical Code (CEC).
Branch Circuit Protection for DC:
UL 489A corresponds to requirements "covering single-pole or multi-pole DC circuit-breakers intended for use as branch circuit overcurrent and short-circuit protection in communications equipment."
Supplementary Protection within the Equipment: Products evaluated according to UL 1077 Standard for supplementary protectors are recognized components which carry conditions of acceptability and therefore have limited application without further investigation by the certification organization listing the final product.
Supplementary protectors are used to protect specific loads more closely rated to the utilization equipment. OEM products may use these devices for protecting sensitive electronic equipment or other equipment that requires unique or specific overcurrent protection.
A UL 1077 Recognized supplementary protector is not a substitute for a branch circuit overcurrent protective device listed to UL 489.
UL 1077 Recognized products must be used in conjunction with branch circuit protection when wiring connected to the supplementary protector exits the equipment to external devices such as receptacles or motors.
The CSA C22.2 No. 235 Standard is equivalent to the UL 1077 Standard.
Tony Moscioni Electrical Inspector Electrical Safety Authority
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Joined: Dec 2001
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wocolt, 240.24(E) Is what allows you to put GFI receptacles in the bathroom. Just think. If it wasn't for 240.24(E), we would have to install GFCI breakers because all overcurrent devices would have to be located in the panel. Anyway, just a thought.
Regards, Doc
The Watt Doctor Altura Cogen Channelview, TX
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I do not believe a GFCI receptacle is an OCPD.
Bob Badger Construction & Maintenance Electrician Massachusetts
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240.24(E) Is what allows you to put GFI receptacles GFCI's are not over current devices! Supplementary protectors are used to protect specific loads more closely rated to the utilization equipment. OEM products may use these devices for protecting sensitive electronic equipment or other equipment that requires unique or specific overcurrent protection. Exactly! This basicly says "no breaker or fuse panels in bathrooms. Dave
Dave
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