Section 2 — Installation
Generac GTS “W” Type Transfer Switch
2.6 AUXILIARY CONTACTS
Use a torque wrench to tighten the
!conductors, being sure not to overtighten, or damage to the switch base could occur. If undertightened, a loose connection would result, causing excess heat which could damage the switch base.
Connect power source load conductors to clearly marked transfer mechanism terminal lugs as follows
1.Connect UTILITY (NORMAL) power source cables to switch terminals N1, N2.
2.Connect EMERGENCY (STANDBY) source power cables to transfer switch terminals E1, E2.
3.Connect customer LOAD leads to switch terminals Load 1, Load 2. (Load 1 and Load 2 are used with
Conductors must be properly supported, of approved insulative qualities, protected by approved conduit, and of the correct wire gauge size in accordance with applicable codes.
Be sure to maintain proper electrical clearance between live metal parts and grounded metal. Allow at least 1/2 inch for
If desired, there are Auxiliary Contacts on the transfer switch to operate customer accessories, remote advisory lights, or remote annunciator devices. A suitable power source must be connected to the COMMON (C) terminal. See Figure 2.3.
Contact operation is shown in the following chart:
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| Switch Position |
| |
|
| Utility | Standby |
|
| Common to Normally Open | Open | Closed |
|
| Common to Normally Closed | Closed | Open |
|
|
|
|
|
|
NOTE:
Auxiliary Contacts are rated 10 amps at 125 or 250 volts AC. DO NOT EXCEED THE RATED VOLTAGE AND CURRENT OF THE CONTACTS.
Figure 2.3 – Auxiliary Contacts
Optional Auxiliary Contact (Actuated)
2.5CONNECTING START CIRCUIT
WIRES
Control system interconnections consist of UTILITY 1 and 2, LOAD 1 and 2
| MAXIMUM WIRE LENGTH | RECOMMENDED WIRE |
|
|
| SIZE |
|
| 460 feet (140m) | No. 18 AWG. |
|
| 461 to 730 feet (223m) | No. 16 AWG. |
|
| 731 to 1,160 feet (354m) | No. 14 AWG. |
|
| 1,161 to 1,850 feet (565m) | No. 12 AWG. |
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|
|
|
|
Side views shown in Utility position
4 Generac® Power Systems, Inc.