NEC NFPA Electrical Code Notes

NEC NFPA Electrical Code Notes The NFPA (National Fire Protection Association) http://www.nfpa.org creates and maintains various safety standards for the United States: NFPA 70: NEC (National Electric Code) NFPA 70E: Standard for Electrical Safety in the Workplace See Also Installing Current Transformers Pressing Service Button in Live Panel

Approvals and Certifications

Approvals and Certifications This page lists approvals and certifications for Continental Control Systems’ metering products. Contents 1 Underwriters Laboratories (UL) Listings 2 ANSI C12.1 Electric Meter Revenue Standard 3 FCC 4 RoHS 5 CE Mark 6 LonMark Certification 7 BACnet Testing Laboratories (BTL) 8 See Also Underwriters Laboratories (UL) Listings UL and cUL Safety Listed: […]

Does the WattNode Need Fuses

Fusing the WattNode Overview There must be an overcurrent protection device (circuit breaker or fuse) protecting each phase conductor connected to the WattNode® meter’s voltage input terminals (green, 5 circuit screw terminal block). However, in some cases, the circuit being monitored is already protected by fuses or circuit breakers and there is no need for […]

CT Installation Safety

CT Installation Safety Overview For maximum safety, our manuals recommend de-energizing live circuits before installing current transformers (CTs). However, this is not always necessary. In all cases, only a licensed electrician should install current transformers and meters. All NFPA and NEC rules should be followed. The following discussion lists and summarizes some of the relevant […]

WattNode Testing with Step-Up Transformer

WattNode Testing with Step-Up Transformer Overview There are times when you may want to test a WattNode in an office or laboratory environment, but you don’t have a voltage source high enough to power the WattNode meter. This page list five solutions: Use a control transformer to step-up 120 Vac to voltages as high as […]

Fusing the WattNode

Fusing the WattNode Overview There must be an overcurrent protection device (circuit breaker or fuse) protecting each phase conductor connected to the WattNode® meter’s voltage input terminals (green, 5 circuit screw terminal block). However, in some cases, the circuit being monitored is already protected by fuses or circuit breakers and there is no need for […]