16900-2
CONTROLS
b. Push buttons shall have removable inserts in eight different colors for
function color coding. Push-button inserts shall be removable from the
front of the control station without disturbing the wiring or mounting of the
control units.
c. Selector switches shall have removable knobs in eight different colors for
function color coding. Selector switch knobs shall be removable from the
front of the control station without disturbing the wiring or mounting of the
control units. Operators for selector switches shall be bat wing type.
d. Emergency stop pushbutton operators shall be large operator head type, red
mushroom-head, maintained type switch with push to open and pull to re-
engage control circuit. Provide multiple output contact type as shown on
the drawings.
e. Indicator lights shall be heavy duty, oiltight and have the following
requirements:
e Designed to operate at 120 volts, 60 Hz AC.
e Provided with a chrome-plated metal or anodized-aluminum mounting
rings, engraved as indicated on the Drawings.
e Lens color shall be as indicated on drawings.
e Shall be 30 mm LED lamp type, with “Push to Test” requirements.
f. Provide legend plates which describe function of each device on control
station.
2. Contact blocks used in heavy duty oil-tight control stations shall be of Square
D Type K single-pole, single-throw (SPST), single-pole, double-throw (SPDT).
Contact blocks shall be suitable for mounting side by side and/or in tandem to
the base of the operator with this following requirements:
a. mounting screws shall be captive with a drilled and tapped head to permit
easy tandem mounting of contact blocks.
b. Terminals shall be pressure wire type with a self-lifting pressure clamp that
will compensate for wire of different size ranging from #12-#18 solid or
stranded.
c. Contacts shall be double break, and silver plated.
3. Class 1 Division 2 operators shall meet all requirements of section 2.1.B.1 with
the addition of devices being hermetically sealed by the factory.
C. Control Circuit Fuses
1. Fuses shall be 3AB ceramic body fuses rated for at least 125 volts at the current
ratings shown on the Drawings. Fuse size shall be 44” x 114”.
2. Blow time shall be:
e 110%, 4 hours minimum;
e 135%, 1 hour maximum;
e 200%, 15 seconds maximum for 1/8-12 amp fuses
e 200%, 60 seconds maximum for 15-30 amp fuses.
3. Fuses shall be Littlefuse, Bussmann, or approved equal.
D._ Relays
1. Industrial Control Relays - Industrial control relays shall be utilized where
specifically called for on the Drawings or within the Specifications. Industrial
control relays with 10 ampere contact rating shall be Square D, Class 8501 Type
13089K
