Grace's Interactive Functioning Voltage Label allows personnel to verify the state of each electrical energy source feeding the enclosure with the panel doors closed
NFPA 70E requires voltage sources to be labeled on the outside of all electrical enclosures. In the past, these labels merely conveyed stagnant information that still required personnel to open panel doors to identify, verify and locate all voltage sources, thereby putting workers at risk. Now, the concept of an interactive, functioning voltage label provides personnel with the ability to both visualize and verify the state of each electrical energy source feeding the enclosure — with the panel doors closed.
The R-1A 0033W-NPLPH assembly, known as the Interactive Functioning Voltage Label, consists of a Voltage Vision R-3W voltage indicator, three ChekVolt R-1A voltage portals and a polycarbonate UV-rated nameplate. The panel mount assembly provides two independent means of checking for the absence or presence of voltage with the control panel still closed. Field retrofits are simple because the nameplate includes pilot hole drilling locators. The ChekVolt R-1A mounts in a ½-inch hole and the Voltage Vision R-3W mounts in a standard 30-millimeter pushbutton hole. For disconnect enclosures, R-1A0033W-NPLPF is designed to mount on a flange rather than a door.
ChekVolt extends a voltage point to the outside of an electrical enclosure so that a Non-Contact Voltage Detector (NCVD) can be used to check for AC voltage without access to the inside of the enclosure.
VoltageVision is a UL-listed device that functions like a permanently mounted voltmeter that monitors both AC and DC voltage between each phase and phase-to-ground. When a phase is lost the LED's corresponding to that phase will go out giving a visual indication of a problem outside of the panel.