Toshiba HV6AS instruction manual Ground Connections, Proper grounding

Page 16 INSTALLATION

GROUND CONNECTIONS

The circuit breaker must be grounded in accordance with the requirements of the National Electrical Code, Article 250 or applicable local standards.

Proper grounding

WARNING connections must be made to the circuit breaker before incoming power is applied.

It is very important that the circuit breaker and its enclosure be adequately grounded to protect the operator from injury in the event of short circuits or other abnormal occurences and to ensure that the metal parts of the equipment, other than live parts, remain at ground potential.

For U and MU type circuit breakers, the ground terminal is on the left side of the operating mechanism as viewed from the rear of the breaker. To make the ground connection, first remove the fastening M6 hex head bolt and crimp-on terminal (provided with the breaker) and crimp the terminal to the end of the ground wire (Fig. 18). Then, reattach the terminal using the same bolt previously removed and torque to 50-65 kgf-cm (43-56 in-lb).

For L and ML type circuit breakers, the ground terminal is on the left side of the terminal block as viewed from the rear of the breaker (Fig. 19). The same instructions as for the U and MU breaker above should be followed to attach the ground wire.

Fig. 18 Ground Connection for U and MU Type Breakers

Fig. 19 Ground Connection for L and ML Type Breakers