GenTran 2026, 3028 User Manual

Installation and Operating Instructions

GENERATOR SAFETY TRANSFER SWITCH MODELS 2026, 3028

Thank you for purchasing a GenTran® Manual Transfer Switch designed to
safely connect a portable generator to the load center in your home or
business (single phase only) for standby power applications. Product features
include:

•

Generator and Utility feeds mechanically interlocked to prevent dangerous
utility or generator back feeding – thereby avoiding property damage and
serious injury to electrical workers.

•

Pre wired for fast, easy connection to the load center

•

Each model can be expanded to up to 10 circuits using interchangeable type
circuit breakers – so as your needs change, just expand it!

•

Accommodates GFCI and Arc-Fault breakers to meet the latest NEC
requirements.

•

Dual wattmeters are provided to help you monitor and balance the loads on
your generator, prolonging generator life

•

Flexible generator connections – Use the Power Inlet for a quick cord
connection to your generator, or ask your contractor to hardwire your
generator connection.

•

Surface or Flush Mounting (with flush mounting plate sold separately).

Warning: Gen/Tran transfer switches should be installed by a professional electrician familiar with electrical wiring and codes, and
experienced in working with generators. Gen/Tran accepts no responsibility for accidents, damages or personal injury caused by
incorrect installation. These transfer switches are intended for surface mounting INDOORS only. GenTran transfer switches are UL
listed to UL Standard 1008 and meet the criteria of National Electrical code Article 702.6 for Optional Standby Systems.

Caution: If using the generator and transfer switch for larger appliances, such as electric water heaters, clothes dryers, electric ranges
and small air conditioners, check the labels on the appliances to be sure they do NOT exceed the rating of the generator. No
appliance should have an amperage rating that exceeds the individual breaker rating in the transfer switch (20 or 30 amps).

Model: 2026 3028

# Circuits Provided 6 8
Max # Circuits 10 10
REQUIRED BREAKER FOR MAIN LOAD CENTER
(not included in this kit)
Breakers Provided with Unit 2 – 15 amp 1-pole

Max GEN Watts 5000 7500
Max GEN Amps 20 Amps 30 Amps
Voltage 120/240 Volts 120/240 Volts
NEMA Type Enclosure 1 – Indoor Only 1 – Indoor Only
NEMA Configuration of Male Inlet L14-20 L14-30
Phase 1 1
Minimum Gauge Cord Size 12/4 10/4

60 amp 2-pole 60 amp 2-pole

2 – 15 amp 1-pole
2 – 20 amp 1-pole
1 – 20 amp 2-pole

2 – 20 amp 1-pole

1 – 20 amp 2-pole

1 – 30 amp 2-pole

Tools Needed for Installation:

• Power Drill

• Wire Stripper and cutter

• Screw drivers

• Tape measure

• Wall anchors and screws

• Other supplies needed if hardwiring to a Power Inlet
Box include Romex, ½” connector, and wire connectors

• 2-pole 60 amp breaker for main panel

Planning Your Transfer Switch Installation:

1. Determine the appliances, circuits or equipment you want to operate with generator power during a power outage, such as:

• Refrigerator/Freezer

• Furnace Blower (gas/oil only)

• TV / Radio

• Lights

2. Determine the amps required for each appliance by reading the label on the appliance. IMPORTANT: No appliance should have
an amperage rating that exceeds the individual breaker rating in the transfer switch. The total amperage of all circuits can exceed
the generator rating, but not all circuits will be able to be used concurrently. Do not connect a 50-amp circuit (such as central air
conditioning or Electric Range) to this system. GenTran is not responsible for accidents or property damage due to incorrect or
inappropriate installation.

3. Assign the circuit # in the load center and in the GenTran
center to the circuit breaker in the transfer switch. Once you’ve determined which circuits you want to connect and the
appropriate amperage, you will be ready to begin installing your GenTran

4. The location of your load center/electrical panel in your home or business will determine where the GenTran
be installed. Refer to the illustrations below. In addition to the transfer switch, you may need additional accessories to complete
your generator transfer switch installation, such as a generator cord and power inlet box. A generator cord (sold separately) is
needed to connect your generator to the GenTran
recommend at least a 25-foot generator cord to reach from your generator outside the garage on the driveway to the transfer
switch. NEVER run a generator in an enclosed area! If your load center is in a basement or interior room, you shall install a
power inlet box (sold separately) on the exterior of your house or building to avoid running the generator cord through a door or
window. Once you have all of the essential components for your specific needs, you may proceed with the installation.

HARDWIRED/BASEMENT INSTALLATION: TYPICAL GARAGE INSTALLATION:

• Water Heater

• Garage Door Opener

• Microwave, Coffee Maker

• Well Pump

®

transfer switch, matching the size of the circuit breaker in the load

®

transfer switch.

®

transfer switch or power inlet box. If your load center is in your garage, we

Power Inlet Box

• Security System

• Sump Pump

• Computer, Fax and Printer

• Cordless Telephone

®

transfer switch will

25 ft. Power Cord

Installation Procedure:

IMPORTANT: Please read this entire procedure before beginning installation. WARNING: For SAFETY, turn OFF
the MAIN circuit breaker in the load center BEFORE starting installation. Remember, the wiring ahead of the
MAIN is HOT, even when the main circuit breaker is off.

Installations with a Generator Cord Connection (Garage Installations):

1. Select a location on right or left side of load center approximately 12 inches to the side of the load center.

2. Find a knockout (KO) on the lower side of the load center that matches the conduit fitting size provided with the Transfer Switch
(1” on both models).

3. Remove the cover from the load center and the knockout selected in step 2.

4.

Determine if the conduit length provided needs to be shortened. If so, remove the wires from the conduit before cutting to avoid

damaging the wires. Then use a utility knife to cut conduit to desired length. . [

2

NOTE: The Electrical Non-Metallic Tubing (ENT)

is UL Listed and recognized by the National Electrical Code (NEC). However, it generally cannot be used in buildings that exceed
(3) floors above grade. While the NEC does allow its use for this application, local codes and inspectors may prohibit its use in
your area. If this situation exists, call 888-GEN-TRAN to request a length of flexible metal conduit (FMC) to use in its place.]

5. Assemble the conduit to the load center and transfer switch after putting the wire harness through the selected knockout in the
load center.

6. Without stressing the flexible conduit, turn the transfer switch to a vertical position, use the enclosed template to mark the hole
locations, and anchor the unit to the wall.

Hardwired Installations from a Power Inlet Box to the Transfer Switch (Basement Installations):

1. Follow steps 1 thru 6 above.

2. To remove the male inlet from lower front of transfer switch, remove the three (3) screws that secure it to the frame. Pull it
directly out. Then loosen the screws that secure the wires into the flanged inlet. Remove and set aside the four (4) screws (2 on
the top, 2 on the bottom) securing the cover. Pull off the cover.

3. Five (5) ½” knockouts are provided for easy wiring using Romex or conduit. Locate and remove your desired knockout. Then
insert connector and locknut followed by the wires.

4. Feed sufficient wire into the transfer switch so that it can be pulled 4” through the removed inlet hole.

5. Connect the wires you just fed through to the four wires removed from the male inlet using wire connectors (provided by
installer). Connect black to black, red to red, and so on.

6. Push wires and wirenuts back into the cavity in the lower portion of the transfer switch. Use the closing plate provided in the
hardware kit to cover the hole left by removing the male inlet.

7. Neatly route the Romex out to the Power Inlet Box. Be sure to secure it according to code along the way.

Wiring your GenTran® Transfer Switch to the Load Center:

1. Please note on the transfer switch that each circuit breaker is rated at 15 amps, 20 amps or 30 amps (on model 3028 only).

2. Installer MUST select the same breaker size in the load center for each circuit in the transfer switch (ie: 15 amps only with 15
amps, 20 amps only with 20 amps, etc.).

3. It is recommended that the MAIN circuit breaker in the Load Center be turned OFF while connecting the wires from the transfer
switch to those in the Load Center. Remember that the wires ahead of the MAIN BREAKER are still HOT, and could cause serious
injury or death if not handled properly. Use extreme CAUTION when wiring inside a LIVE load center.

4. From the harness wires now in the load
center, locate wire A4. Then select a

Model 3028

9. Find the Green wire from the transfer switch. Strip 5/8”, and insert into the ground bar in the Load Center or if there is no ground
bar, insert it into an unused hole in the neutral bar.

desired circuit breaker in the load center
with the same rating (ex: 15 amps). See
Wiring Diagram at left.

5. Turn off this selected breaker and remove
the wire from the breaker in the LC.
Connect Blue wire using a wirenut to the
wire removed from the breaker.

6. Locate the blue wires with the
corresponding markings (ie: A5, B5, A6, B6,
etc.) turn OFF the appropriate breaker(s) in
the Load Center, remove the wire(s) from
the breaker(s) cut to a convenient length,
strip each 5/8”, and connect them to the
desired wire from the transfer switch using
wire connectors.

7. Follow this procedure for each of the
remaining circuits. (Blue connected using
wirenuts to the wire removed from the
breaker).

8. Find the White wire from the transfer
switch. Strip 5/8”, and insert into an
unused hole in the Neutral bar.

3