fuel dispenser disconnect

T

teeg123

Member
Location
Maine
Occupation
Journeyman Electrician
Hello,
I had a test question on my master's test, and it doesn't make sense to me or I'm over thinking it.

The disconnect for a fuel dispenser will shut all circuit expect?
A) fuel pump
B) credit card
C) video camera
D) a light located 12 feet (may have been 20 feet it was a little while ago) above pump.

Thanks very much for your assistance
 
514.13 Provisions for Maintenance and Service of Dispensing Equipment. (from the 2023 NEC)

Each dispensing device shall be provided with a means to remove all external voltage sources, including power, communications, data, and video circuits and including feedback, during periods of maintenance and service of the dispensing equipment. The location of this means shall be permitted to be other than inside or adjacent to the dispensing device. The means shall be capable of being locked in the open position in accordance with 110.25.

Enhanced Content:
Because extensive control and communications circuitry is integrated into today’s fuel dispensing equipment, simply shutting off the main power source to the dispenser or remote pump does not necessarily ensure that the equipment has been isolated from all sources of voltage. For the safety of personnel servicing dispensing equipment, a means to disconnect all external voltage sources from each dispensing device, including sources that may backfeed into the dispenser, must be installed so that the equipment is completely isolated from all voltage sources. By doing so, the threat of arcing or sparking, including ignition-capable arcing from limited energy sources, is mitigated. For power circuits, interruption of grounded (neutral) conductors in addition to the ungrounded conductors of a circuit is required by this section. The interior of an typical electronic dispensing unit is pictured below. Power is required to be removed from printers, displays, keypads, and card readers.
 
Maybe 514.11 more directly answers the question:
514.11 Circuit Disconnects.
(A) Emergency Electrical Disconnects.
Fuel dispensing systems shall be provided with one or more clearly identified emergency shutoff devices or electrical disconnects. Such devices or disconnects shall be installed in approved locations but not less than 6 m (20 ft) or more than 30 m (100 ft) from the fuel dispensing devices that they serve. Emergency shutoff devices or electrical disconnects shall disconnect power to all dispensing devices; to all remote pumps serving the dispensing devices; to all associated power, control, and signal circuits; and to all other electrical equipment in the hazardous (classified) locations surrounding the fuel dispensing devices. When more than one emergency shutoff device or electrical disconnect is provided, all devices shall be interconnected. Resetting from an emergency shutoff condition shall require manual intervention and the manner of resetting shall be approved by the authority having jurisdiction. [30A:6.7] The emergency shutoff device shall disconnect simultaneously from the source of supply, all conductors of the circuits, including the grounded conductor, if any. Equipment grounding conductors shall remain connected.
 
ptonsparky ...except .... what

Tealheals,
thanks for your input. I personally thought it would have been the lighting. The lighting would be on its own circuit or at least that's my train of thought. Correct I read 514.11 several times which lead me to the lighting, but I could surely be wrong.

thanks again folks
 
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