INSTALLATION | Series 185 |
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Installation of the ASCO Series 185 automatic transfer switch (ATS) must be performed by a licensed electrician. It must be installed according to the National Electrical Code (NEC) and all local electrical code requirements. Remove the enclosure cover and inspect the ATS for shipping damage. If damage is evident do not install the ATS.
1 --- Mounting
Refer to the enclosure outline drawing. Mount the ATS according to details and instructions shown on this diagram. Mount the ATS vertically to a rigid supporting structure. Level all mounting points by using flat washers behind the holes to avoid distortion of the enclosure.
MALFUNCTION or SHORTENED LIFE
Protect the ATS from construction grit and metal chips to prevent malfunction or shortened life.
Transfer switches rated 260 and 400 amperes are mounted on an insulator backing piece (installed behind the transfer switch). If the transfer switch is removed from the enclosure and then reinstalled, this insulator must be placed behind the transfer switch. See Figure 1.
FLASH HAZARD – DAMAGE
Be sure that the insulator piece is installed behind the 260 and 400 ampere transfer switches.
insulator backing piece
Figure 1. Insulator for 260 and 400 A.
2 --- Electrical Power Connections
Refer to the wiring diagram. The ATS must be protected by suitably sized circuit breakers feeding the utility and generator source terminals. The rating of the circuit breakers must be based on the requirements of the National Electrical Code for its nameplate ampere and short circuit withstand ratings.
ELECTROCUTION HAZARD Turn off utility power and turn off the generator to prevent electrocution when wiring the transfer switch.
Cable Spacers for 200 and 230 A
Three cable spacers are included with 200 and 230 ampere transfer switches. Run the copper power cables through the cable spacers as shown in Figure 2. Position the cable spacers approximately 1½ inches from the terminal lugs.
CABLE LOOSENING DUE TO SHORT CIRCUIT Install three cable spacers 1 1/2 inches from the power terminals to prevent the cables from loosening during a
cable spacers
1 ½ inch approximate
use copper power cables only for 200 and 230 A
cable spacer
Figure 2. Cable spacers for 200 and 230 A.
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