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INFORMATION & REQUIREMENTS ELECTRIC SERVICE - NStar

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SKETCH 15 SKETCH 16<br />

Hot and Cold Sequence Diagrams<br />

Company Meter Socket and Connection Requirements<br />

Service Number Location of<br />

Size Service Number Socket of Sketch Serv.Disconnect<br />

(Amps) (Volts) of Phases Wires Terminals Number (Hot or Cold Seq.)<br />

200 120/240 1 3 4 17,18 H<br />

HOT SEQUENCE METERING<br />

LINE<br />

M<br />

METER<br />

COMPARTMENT<br />

<strong>SERVICE</strong><br />

DISCONNECT<br />

SWITCH<br />

LOAD<br />

200 120/208 1 3 5 17,18 H<br />

200 240 3 3 5 19 H<br />

200 480 3 3 5 19 C<br />

200 120/208 3 4 7 20 H<br />

200 277/480 3 4 7 20 C<br />

400 120/240 1 3 5 21 H<br />

400 120/208 1 3 5 21 H<br />

400 120/208 3 4 7 22 H<br />

COLD SEQUENCE METERING<br />

LINE<br />

METER<br />

DISCONNECT<br />

SWITCH<br />

M<br />

LOAD<br />

METER<br />

COMPARTMENT<br />

400 277/480 3 4 7 22 C<br />

1. All sockets must be listed for use by a recognized testing agency.<br />

2. For more specific details regarding location of service disconnect (hot or<br />

cold sequence) refer to section 705.<br />

3. For locations where current limiting protection is required refer to<br />

section 705C.<br />

4. For specifics regarding sockets with manual bypass refer to section 715.<br />

124 125

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