16050-6
BASIC MATERIALS AND METHODS
5. Three conductor shielded cable for use with remote potentiometers for varying
motor speeds etc. Cable shall be stranded, tinned copper, polyethylene
insulated, drain wires with aluminum-polyester shielding with #18 awg
stranded copper drain wire surrounded by a chrome PVC jacket. Control cable
shall be rated 600 volt and shall be UL listed with 100% shield
coverage. Acceptable Manufacturers: Belden, Alpha Wire & Cable or
approved equal. Provide three conductor shielded cables equivalent to Belden
type 8618 or equivalent unless specified otherwise by the instrument
manufacturer.
Motor Starters
1. For Single Phase Motors: Fractional Horsepower Manual Motor Starter with
Thermal Overload(s) and a red running indicating light unless noted otherwise:
a. 120 Volt, Single-Pole, H-O-A Selector, Surface Mounted: Square-D FG-71P
2. For Three Phase Motors: Shall be combination starter/disconnect type,
employing magnetic starter (NEMA Size 1 minimum), rated to match the
equipment served, with thermal overload protection for each phase and with an
M.C.P. type circuit breaker/disconnect sized per the circuit breaker
manufacturer's recommendations for coordination with the thermal overload
protection, lights, relays and auxiliary devices. Combination starters shall be
provided with a 480, 240 or 208-120 volt control power transformer with
primary and secondary fusing. Provide 2 N.O. and 2 N.C. auxiliary contacts.
3. Refer to control wiring diagrams on the drawings for specific requirements and
devices.
4. Acceptable Manufacturers:
5. Square-D, Cutler-Hammer, General Electric, Allen-Bradley, Siemens or
approved equal.
Safety Switches
1. All safety switches shall be NEMA Type HD and Underwriters Laboratories
Listed.
2. The handle position shall indicate whether the switch is "ON" or "OFF".
3. All current carrying parts shall be plated to resist corrosion and promote cool
operation. Switches shall have removable arc suppressers where necessary to
permit easy access to line side lugs. Lugs shall be front removable and UL
listed for 60°C or 75°C, aluminum or copper wires.
4. Provisions for padlocking the switch in the "OFF" position with at least three
locks shall be provided.
5. Switches shall have a dual cover interlock to prevent unauthorized opening of
the switch door when the handle is in the "ON" position, and to prevent closing
of the switch mechanism with the door open.
6. Disconnect switches, indicated on the drawing to be used for motors controlled
by variable frequency drives shall be as indicated above, except shall be 4 pole
type switches. The fourth pole shall be wired directly to the disable input, in
series with the safety e-stop, in order to lock-out and immediately shutdown the
drive. The auxiliary 4th pole shall open prior to any of the other three power
poles and shall be designed for proper use with VFD type load circuits.
7. Enclosures
13089K
