Before You Begin

Before performing any of the tasks listed in the table starting, you must be familiar with and follow the requirements contained within NFPA 70E: Standard for Electrical Safety in the Workplace or CSA Z462: Workplace Electrical Safety. In addition, all electrical equipment must be installed in accordance with local and national installation codes and adequately maintained per NFPA 70B: Recommended Practice for Electrical Equipment Maintenance and instructions from Schneider Electric. Failure to follow the safety recommendations can result in death or serious injury, as well as property damage.

Square D equipment manufactured by Schneider Electric is designed, built, and tested to comply with industry standards, including but not limited to the following standards:

• C37.20.1, IEEE Standard for Metal-Enclosed Low-Voltage Power Circuit Breaker Switchgear

• C37.20.2, IEEE Standard for Metal-Clad Switchgear

• C37.20.3, IEEE Standard for Metal-Enclosed Interrupter Switchgear

• C37.20.7, IEEE Guide for Testing Metal-Enclosed Switchgear Rated Up to 38 kV for Internal Arcing Faults

• UL 67, Panelboards

• UL 98, Enclosed and Dead-Front Switches

• UL 845, Motor Control Centers

• UL 891, Switchboards

With the exception of C37.20.7, these standards do not require that equipment be tested for internal arcing faults. Schneider Electric's position is to de-energize equipment to establish an electrically safe work condition prior to working on or inside the equipment. Always follow safety precautions.

DANGER

hazard of electric shock, explosion, or arc flash Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E or CSA Z462. The equipment must be installed and serviced only by qualified electrical personnel. NEVER work alone and be sure to follow all safety procedures applicable to site and equipment. Before performing visual inspections, tests, or maintenance on the equipment, disconnect ALL sources of electric power. Assume all circuits are live until they are completely de-energized, tested, grounded, and tagged. Pay particular attention to the design of the power system. Consider all sources of power, including the possibility of back-feeding. Always practice lock-out/tag-out procedures according to OSHA requirements. Always use a properly rated voltage sensing device to confirm power is off by following NFPA 70E or CSA Z462 guidelines for establishing an electrically safe work condition. Circuit breaker and switch contacts must be open and all springs discharged before performing maintenance work, disconnection, or removal of a circuit breaker. Conduct electrical testing to confirm no short-circuits were created during installation, maintenance, or inspection. Never insert a circuit breaker into a circuit breaker compartment that is not complete and functional. Be aware of potential hazards, wear personal protective equipment, and take adequate safety precautions. Before replacing covers, closing doors, and turning on equipment, carefully inspect the work area for tools and objects that may have been left inside the equipment. When removing or installing panels, be careful not to touch them to energized bus. Replace all devices, doors, and covers before turning on power to the equipment. Failure to follow these instructions will result in death or serious injury.