Edison-base Fuseholder Requirements

Edison-base fuseholders shall be used only if they are made to accept _____ fuses by the use of adapters.

a) Edison-base
b) medium-base
c) heavy-duty base
d) Type S

See answer and applicable Code reference

The correct answer is: d) Type S

Article 240 provides the general requirements for overcurrent protection and overcurrent protective devices operating at 600V or less. Part V of this Article focuses on plug fuses, fuseholders and adapters. As specifically noted in Sec. 240.52, "Fuseholders of the Edison-base type shall be installed only where they are made to accept Type S fuses by the use of adapters."

 

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