The equipment needed at the point where electrical service enters a building. Refers to equipment related to the point of entry for electrical service, not electrical equipment at a building's service entrance. This equipment normally consists of the main junction box, circuit breakers and/or fuses, and any additional equipment located between the main junction and the service drop, including meters.

Service entrance equipment is rated by size, and its size is a measure of the total current capacity of the equipment. Older homes typically have 100 amp service; newer homes commonly offer twice this capacity. Service entrance equipment size for commercial establishments may be measured in thousands of amps.

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