Specifications - State of Delaware

SECTION 262416 - PANELBOARDS: continued
breakers rated 1,000 amperes or more. Provide breakers with thermal and instantaneous
magnetic trip, with fault-current limiting protection when required and ampere ratings as
indicated. Provide fixed, non-interchangeable trips for circuit breakers rated 15-400A.
Provide fixed, interchangeable magnetic and thermal trips for circuit breakers rated higher than
400A. Construct with over center, trip free, toggle-type operating mechanisms with quickmake,
quick-break action and positive handle trip indication. Construct breakers for mounting
and operating in any physical position, and operating in an ambient temperature of 40ºC.
Provide breakers with mechanical screw type removable connector lugs, AL/CU rated.
Provide "SWD" switching duty circuit breakers for all single pole circuit breakers that directly
control (no switch provided) 120 and 277V fluorescent and HID lighting circuits in lighting
panelboards.
G. Accessories: Provide panelboard accessories and devices including, but not necessarily limited
to, ground fault circuit interrupter (GFCI) breakers, integral contactors, feed through lugs, split
bus construction, circuit breaker handle locks, etc., as recommended by panelboard
manufacturer for ratings and applications indicated. Provide circuit breaker handle locks on all
circuits that supply night lights, exit signs, emergency lights, emergency power, energy
management control system (EMCS) panels and fire alarm panels.
H. Metering: CTs, PTs, kWH meter, and instrument phase selector switches as indicated. Mount
meters semi-recessed in front doors and install meter wiring and lacing with sufficient
flexibility at hinged edge of meter front mounting plates to prevent damage. Provide the
following meter devices:
1. Volt and ampere meters: Switchboard type, semi-flush unit that is 4-1/2 inches square.
Provide 1% accuracy of full scale. Provide black metal trim, white dial, black figures,
and black pointer. Provide ammeters with a 0-5 ampere range (scale as required) and
voltmeters with a 0-150V range (scale as required).
2. Voltmeter transfer switches: Provide a knurled knob handle with a minimum of seven
positions (A-B, B-C, C-A, A-N, B-N, C-N and OFF).
3. Ammeter transfer switches: Provide a knurled knob handle with four positions (A, B, C
and OFF).
4. Potential transformers: Provide dry type, 600Vac insulated, 480V primary, 120V
secondary. Provide accuracy to conform to ANSI classification 0.3 W, X, Y with
burdens corresponding to meters connected.
5. Current transformers: Dry type, toroidal brushing (or wound type), ratio as indicated,
secondary terminals connected to short-circuiting-type terminal blocks. Provide thermal
and mechanical ratings corresponding to applied equipment.
6. kWH meters: Provide with mechanical, resettable, pointer type, demand register.
Provide with kW demand pulsed contact closures for remote indication.
PART 3 - EXECUTION
3.01 EXAMINATION:
A. Examine areas and conditions under which panelboards and enclosures are to be installed. Do
not proceed with work until unsatisfactory conditions have been corrected.
3.02 INSTALLATION OF PANELBOARDS:
A. Install panelboards and enclosures as indicated, providing NEC required working space, in
accordance with manufacturer's written instructions, applicable requirements of NEC and in
compliance with recognized industry practices to ensure that products fulfill requirements.
262416-4 DEAN262416.DOC