Disconnect the Neutral Too?

摘要

An electrical contractor recently requested information about the required emergency disconnects for a motor-fuel-dispensing facility. The questions related to whether the emergency power off (EPO) had to disconnect the neutral (usually the grounded conductor) in addition to all the circuit conductors feeding the dispensers and fuel pumps. Some inspection agencies require the EPO to disconnect all circuit conductors, including the neutral. Let's take a look at the National Electrical Code's (NEC) minimum requirements.