Architectural and Engineering Design Standards

(avery) #1

Rev. 13 November 1, 2016


Page | 81


  1. Installation
    a. In masonry walls, switches and receptacle he ights shall be adjusted as required so outlets are at nearest
    mortar joint to specified height.
    b. Dimmers sha ll be installed such that de rating is not required. No fins shall be removed whe n dimmers
    are ganged tog ethe r.
    c. A separate ne utral shall be installed for all circui ts which supply lighting controlled by dimmers.
    d. Receptacles shall be installed so the g round prong is u p.
    e. Feeding of receptacles do wn stream of GFI receptacles for protection in lieu of prov iding multiple GFI
    receptacles sha ll not b e done.
    f. GFI type receptacles shall be specified in damp or wet locations, near any source of water, above counter
    tops that also have a sink, kitchens, restrooms, and other locations per NEC.
    g. Utilize integral tampe r resistant receptacles in all Pediatric and Psychiatric care units.
    Receptacle covers shall not be used.


26 28 00 Low-Voltage Circuit Protective Devices

26 28 13 Fuses


  1. Main Feeders and Branch Circuit Equipment Feeders: For switch rating over 600 amperes, use Hi-Cap,
    Type KRP0-C with interrupting rating of 200,000 amperes RMS. For switch rating 600 amperes or less, use
    Low peak current limiting fuses, Type LPN(S)-R, with interrupting rating of 200,000 amperes RMS. Verify
    the use of fuses versus circuit breakers for main services or feeders with the Owner for each project.

  2. Motors Above One (1) Horsepower: For fuse rating 600 amperes or less, dual element time delay, Type FRN(S)-
    R, with interrupting rating of 200,000 amperes RMS. Size fuses per Article 430 of the NEC.


26 28 16 Enclosed Switches and Circuit Breakers


  1. Circuit Breakers
    a. Lighting and Appliance Panelboards: Circuit breakers shall be plug-on type toggle action with quick-make,
    quick-break mechanism, with visi-trip. Single pole 15 and
    20 ampere circuit breakers shall be UL listed as switching breakers at 120/277 volt AC and carry the SWD
    marking. Tandem or “piggyback” breakers providing two circuits from one pole space are prohibited.
    b. Distribution Panelboards or Switchboards: Circuit breakers shall have overcenter, trip-free toggle-type
    operating mechanisms with quick-make, quick-break action and positive handle indication. Each circuit
    breaker shall have a permanent trip unit containing individual thermal and magnetic trip elements in each pole.
    Operating handles shall assume a center position when tripped. Breakers rated 250 amps and above shall be
    solid state type, and breakers rated below 250 amps shall be thermal- magnetic.
    c. All circuit breakers shall be labeled with nameplates or as part of a typewritten panel directory. Each
    panelboard directory shall be typewritten to identify the load fed by each circuit. Spare breakers and circuits to
    be left blank with circuit breaker in off position.

  2. Disconne ct Switches
    a. All disconnect switches shall be heavy duty type and shall be fused.
    b. Disconnect switches for fractional horsepower motors, ½ horsepower and smaller, and less than 125 volts shall
    be Bussman SSY type or Owner approved equal.

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