These requirements cover fused power-circuit devices to be employed in accordance with the National Electrical Code.
Fused power-circuit devices, as covered by these requirements, are considered to be either bolted pressure contact switches or high-pressure butt-type contact
switches.
Bolted-pressure contact switches are devices in which the blade-jaw connections have an additional pressure or clamping action provided at both ends of the switch
blades when the blades are in the fully closed position.
High-pressure butt-type contact switches are devices having butt-type contacts and a spring-charged mechanism.
These requirements do not apply to low-voltage AC power circuit protectors as covered by the Standard for Low Voltage AC Power Circuit Protectors Used in
Enclosures, ANSI/IEEE C37.29, or to low-voltage AC integrally fused power circuit breakers as covered by the Standard for Low-Voltage AC Power Circuit
Breakers Used in Enclosures, ANSI/IEEE C37.13.
Fused power-circuit devices may be manually or electrically operated and may incorporate electrical tripping means.
| Edition : | 4th |
| Number of Pages : | 84 |
| Published : | 11/30/1994 |
