Drawing Index; Installation - Asco 917 Owner's Manual

These RC Switches are UL–508 listed and are available
in 2 to 12 pole single throw double break and 2 to 6 pole
normally open and normally closed configurations.
Control voltages are from 120 to 480 V ac. See tables A,
B, and C for contact ratings.
Do not exceed these values. Exceeding the
rating can cause personal injury or serious
equipment damage.
Table A – Maximum AC Voltage and Current Ratings
for ASCO 917 & 918 Main Contacts (open or closed)
Amperes
Load Load
Continuous C ti
Type Type
917 918
General 30 30
Standard
20 30**
Ballast*
Tungsten 20 20
* ASCO 918 is preferred for HID and metal halide loads.
** 20 A Standard Ballast Rating for ASCO 918 N/O & N/C.
Drawing Description
RC Switch Outline & Mounting
Outline & Mounting with Accessories
Wiring Diagram
Wiring Diagram with Accessories
Enclosure Outline & Mounting
ASCO 917 & 918 Remote Control (RC) Switches are
pre–tested and ready to use. Installation requires
mounting and connection of service cables and control
circuit wires. An experienced licensed electrician should
install the RC Switch.
Each RC Switch has a ratings / identification label
defining load types and maximum voltage ratings. Use
the switch only within the limits shown on this label.
Do not exceed the values on the rating label.
Exceeding the rating can cause personal injury
or serious equipment damage.
To prevent malfunction or shortened life, protect
the switch from construction grit and metal chips.
Mounting: Five Outline and Mounting Diagrams are
furnished. Select the appropriate diagram and mount the
RC Switch. All mounting details and instructions are
shown on the diagrams.
ASCO 917 & 918 Owner's Manual
Poles to Load
1 for 1 for 2 for 1 phase 2 for 1 phase
1 phase 3 for 3 phase
347 V ac 600 V ac
347 V ac 600 V ac
250 V ac 250 V ac

Drawing Index

Standard RC Switch

Installation

Table B – Maximum DC Voltage and Current Ratings
for ASCO 917 & 918 Main Contacts (open or closed)
Amperes Amperes
Load Type Load Type
Continuous
General 20
Table C – Withstand Current Ratings
for ASCO 917 & 918 Remote Control Switches
Available Symmetrical Amperes RMS
At AC At AC
Service Voltage
Current Rating
250 V
480 V
600 V
N/O & N/C RC Switch
361069
363164
361068
363165
363104
The RC switch can be mounted in any position but is
usually mounted vertically. Mounting holes in open–type
RC Switches accept #10 screws (3/8–inch minimum
length). Enclosure mounting holes accept 1/4–inch
diameter screws.
Line and Load Connections
Deenergize the branch circuit to be connected
to the RC Switch and the control line too.
Four Wiring Diagrams are furnished. Line and load
terminals are reversible. The RC switch is UL listed for
use with 60 or 75 degrees C cable. All power wires
should enter enclosure adjacent to the RC switch
terminals. Combination knockouts are provided on
NEMA Type 1 enclosures. Line and load connections are
supplied with clamp–type terminals. These terminals
accept the wire sizes #18–10 AWG Cu. Insert appropri-
ate line and load wires and tighten clamp screws to 18
inch–pounds.
2
Poles to Load
2 in Series 3 in Series
125 V dc 250 V dc
When Used with
Molded–Case Circuit Breakers
Withstand Maximum
Breaker Size
(amperes) (amperes)
22,000 30
14,000 30
10,000 30
383826
383897
383825
383880 10 & 11
363104
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