什么情况下电气设备需要操作许可？那些人需要操作许可？

Who needs a permit?
Those who own, operate or maintain the following electrical equipment, require an operating permit when:

(1)  the operation or design of electrical equipment is such that regular or ongoing maintenance is required;需要定期维护

(2)  the electrical equipment is operated within Class I, Class II, or Class III hazardous locations;在危险区域

(3)  the electrical equipment is operated or maintained for emergency service;用于紧急服务

(4)  the electrical equipment is part of a fire alarm system;是火警告系统一部分

(5)  the supply is greater than 250 kVA; 超过250kVA

(6)  the supply to privately owned equipment, except for high voltage neon signs, is greater than 750 volts; or 超过750V

(7)  the equipment is installed for temporary use and the supply is greater than 5 kVA.供电大于5kVA的临时安装设备