Section 2 — Installation
Generac GTS “W” Type Transfer Switch
Solderless,
The conductor size range is as follows:
2.5CONNECTING START CIRCUIT WIRES
Switch Rating | Wire Range |
200A |
|
Conductor sizes must be adequate to handle the max- imum current to which they will be subjected; based on the 75°C column of tables, charts, etc. used to size conductors. The installation must comply fully with all applicable codes, standards and regulations.
Before connecting wiring cables to terminals, remove any surface oxides from the cable ends with a wire brush. All power cables should enter the switch next to transfer mechanism terminals. If ALUMINUM con- ductors are used, apply corrosion inhibitor to con- ductors. Tighten terminal lugs to the torque values as noted on the decal located on the inside of the door. After tightening terminal lugs, carefully wipe away any excess corrosion inhibitor.
All power cables should enter the switch next to the transfer mechanism terminals.
Use a torque wrench to tighten the conduc-
!tors, being sure not to overtighten, or dam- age to the switch base could occur. If under- tightened, 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, (N3).
2.Connect emergency (STANDBY) source power cables to transfer switch terminals E1, E2, (E3).
3.Connect customer LOAD leads to switch termi- nals T1, T2, T3.
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.
Control system interconnections (Page 11) consist of UTILITY 1 and 2, LOAD 1 and 2; and leads 23 and
194.Control system interconnection leads must be run in a conduit that is separate from the AC power lead. Recommended wire gauge sizes for this wiring depends on the length of the wire, as recommended below:
| 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. |
|
2.6AUXILIARY CONTACTS
If desired, there are Auxiliary Contacts on the trans- fer 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:
|
| 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)
Be sure to maintain proper electrical clearance between live metal parts and grounded metal. Allow at least 1/2 inch for
Side views shown in Utility position
4 Generac® Power Systems, Inc.
