Specifications

PIP ELSAP20 June 2007
Low-Voltage Automatic Transfer Switch
4.6.1.6 Unless otherwise specified on the purchaser’s PIP ELSAP20D Data
Sheet, finish shall be supplier’s standard.
4.6.2 Space Heaters
4.6.2.1 If specified on the purchaser’s PIP ELSAP20D Data Sheet, space
heaters shall be provided.
4.6.2.2 Heaters shall be rated at 240 volts and sized to provide the required
heat output when operated on a 120-volt system.
4.6.2.3 Space heaters shall be mounted on a stand-off insulator and provided
with an expanded metal cage for personnel protection.
4.6.2.4 A caution plate, as shown in Figure 1, shall be provided on the door
of a transfer switch if a space heater has been specified.
OBSERVE CAUTION
EXTERNAL POWER SOURCE
CONNECTED TO SPACE HEATER
Figure 1. Caution Plate
4.6.2.5 Unless specified otherwise on the purchaser’s PIP ELSAP20D Data
Sheet, circuits for space heaters shall be furnished by purchaser.
4.6.2.6 As specified on the purchaser’s PIP ELSAP20D Data Sheet, either
adjustable thermostat controls or high-temperature cutouts shall be
provided.
4.6.2.7 If specified on the purchaser’s PIP ELSAP20D Data Sheet, normally
closed, momentary test push buttons, and analog ammeters shall be
provided.
4.6.3 Nameplates
4.6.3.1 Prominent and detailed instruction plates shall be provided for
convenient operation.
4.6.3.2 Nameplates shall be made of laminated plastic 3/32-inch thick
minimum and shall be provided with stainless steel hardware.
4.6.3.3 In addition to external identification, door-mounted devices shall be
identified inside the compartments. Inside nameplates may be
adhesive type.
4.6.3.4 Nameplates shall be white with 1/4-inch-high minimum engraved
black lettering.
4.6.3.5 Meters, relays, switches, and other devices on and within the transfer
switch shall be permanently identified.
4.7 Inspection and Testing
4.7.1 Unless otherwise specified on the purchaser’s PIP ELSAP20D Data Sheet,
supplier’s standard tests shall be performed.
4.7.2 If specified on the purchaser’s PIP ELSAP20D Data Sheet, purchaser will
witness supplier’s standard tests.
Page 8 of 10 Process Industry Practices