VEVOR Manual Transfer Switch

Introduction

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Contact Information and Warnings

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This document contains the original instructions. Please read all manual instructions carefully before operating. VEVOR reserves the right to interpret its user manual. The appearance of the product is subject to the item received. Updates to technology or software on our products will not be separately notified.

Safety Information

⚠️ Warning: To reduce the risk of injury, user must read instructions manual carefully.

⚠️ Warning: Improper installation of this transfer switch could cause damage or personal injury by electrocution or fire. Installation must be performed by a licensed electrician or qualified professional in accordance with applicable electrical codes. Inspection by the local inspection authority is required. Inspection records should be kept for insurance claims.

FCC Compliance: This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

Warnings & Caution

General Safety

1. The National Electrical Code states that connecting a generator to any electrical circuit normally powered by an electrical utility must be done via an approved transfer switch to isolate the circuit from the utility system when the generator is operating.
2. A licensed electrician or qualified professional must install this VEVOR Switch according to local code.
3. To reduce the risk of electrical shock, the MAIN circuit breaker in the load center must be in the OFF position during installation.

Generator Use

1. The portable generator used with your VEVOR transfer switch must be operated outside of any building.
2. This product is suitable only for use with a generator with a floating neutral.
3. ⚠️ Warning: Follow generator manufacturer's instructions for removing the bond between generator neutral and frame.
4. Always plug the power cord set into your generator and the power inlet box before starting the generator, and always shut the generator down before detaching the power cord set.
5. Do not overload your generator; its circuit breakers will trip. Use the VEVOR transfer switch's built-in watt meters to balance loads and avoid impeding your generator's performance.

Installation Preparation

1. Decide which circuits will be powered by the generator during a power outage. Recommended circuits include fireplace/furnace fan (gas or fuel only), sump pump, refrigerator, freezer, one lighting or kitchen appliance circuit, and possibly another lighting circuit. Most well pumps are 240V, and other 240V appliances will utilize two VEVOR transfer switch circuits (e.g., C&F on 6-circuit models or D&I and E&J on 10-circuit models).
2. Identify load center circuits rated at 15 amps or less. Designate these for VEVOR transfer switch circuits. Identify load center circuits rated at 20 amps and designate them for the 20 amp VEVOR transfer switch circuits.
3. (SP-ZH352510(50A-10) models only) Identify the 30 amp circuit to be used.
4. When connecting to branch circuits with AFCI or GFCI breakers, the AFCI/GFCI protection will be lost only when the toggle switch is in the GEN position. To retain AFCI/GFCI protection when running on generator power, install appropriate breakers in the transfer switch.

VEVOR is not responsible for damage or injury caused by incorrect installation of this transfer switch.

Switch Specification Introduction

Your VEVOR transfer switch provides a safe way to utilize generator power through your existing electrical wiring during a power outage. Install the switch next to your home's electrical panel load center and connect circuit breaker wires to the transfer switch's circuits. After powering up your portable generator, manually turn on each switch to transfer generator energy to the house circuits.

Your VEVOR transfer switch is easy for a licensed electrician or qualified professional to install, safe for homeowners to operate, and compatible with 120/240V single-phase AC generators equipped with a NEMA L14-30 (30 amp models) or NEMA CS6375 (50 amp model) receptacle.

The VEVOR transfer switch prevents simultaneous connection to both utility and generator power, eliminating the possibility of backfeeding.

Specification Sheet

Product Diagram

The VEVOR Manual Transfer Switch unit features a powder-coated steel enclosure designed to meet NEMA 3R protection level for indoor and outdoor environments, offering dustproof and waterproof capabilities.

Inside, there are:

• Mini breakers: Each transfer switch circuit has an interchangeable circuit breaker that protects the branch circuit when the circuit selector switch is in the GEN position. In the LINE position, the load center's breaker protects the branch circuit.
• Circuit selector switches: These switches allow selection of either GEN (generator) or LINE (utility) as the power source for wired branch circuits. The OFF position is generally not used, as it removes the branch circuit from both power sources.
• Handle ties: Used for 240-volt circuits or multi-wire branch circuits. They can be removed for 120-volt circuits.
• Analog wattmeters: Two meters indicate the total load in watts on each column of the generator when it is supplying power. The left meter measures loads on circuits A, B, C (6-circuit) or A, B, C, D, E (10-circuit). The right meter measures loads on D, E, F (6-circuit) or F, G, H, I, J (10-circuit). For a 10-circuit switch, the left meter connects to X live wire from the generator and shows the total load for column A-E; the right meter connects to Y live wire and shows the total load for column F-J.
• 1-1/4 NPT PVC Fitting: For utility power input cable and appliance output cable.
• 1/2 NPT PVC Fitting: For generator input cable.

Installation Instructions

General Setup

1. Determine Location: Decide where to locate the VEVOR transfer switch, either to the left or right of the load center. If placing it to the right, you may need to relocate the wire bundle to exit the left side. The switch is factory assembled with the wire bundle exiting right.
2. Relocate Wire Bundle (if needed): Open the front cover by removing four screws. Remove the stopper on the left side. Remove the conduit fitting, carefully remove the wire bundle, and route it through the jam nut and the hole on the left side. Slide the conduit fitting over the leads and secure with the jam nut. Re-fix the stopper on the right side hole.
3. Turn Off Power: The main circuit breaker or service disconnect to your load center must be switched to the OFF position. ⚠️ CAUTION: This does not affect the wires on the LINE side of the main breaker; they will remain live!
4. Remove Load Center Cover: Remove the cover of the load center.
5. Identify Knockout: Identify the appropriate knockout to remove in the load center. A 1-1/4" trade size knockout is installed from the factory.
6. Trim Conduit: Trim the supplied conduit to the desired length and slide it over the VEVOR transfer switch wires. Attach it to the fitting on the VEVOR transfer switch. Slide the supplied fitting over the wires and attach it to the conduit.
7. Insert Wires: Insert the wires from the conduit through the knockout, taking care not to nick or gouge the wires on the metal edge. Slide the lock nut over the loads and tighten securely onto the conduit fitting.
8. Secure Switch: Without over-manipulating the flex conduit, secure your VEVOR transfer switch to the wall using fasteners appropriate for the wall's construction.

Wiring to the Load Center

Determine which circuits will be used during an emergency. The residential wattage requirement chart can be a guide, but actual appliance wattages may vary. If a selected circuit is part of a multi-wire branch circuit, ensure the other branch circuit sharing the neutral is also connected to the transfer switch. The two circuits must be connected to opposing legs (phases) of the generator power, and a handle tie must be installed on the switch handles so both legs are transferred simultaneously.

⚠️ Warning: Failure to properly install a multi-wire branch circuit could result in overloading the neutral wire.

The maximum number of circuits and those available for multi-wire branch circuits depend on the transfer switch model:

Wattage Requirements

1. Most appliances and motors have current ratings noted directly on them. Light bulb wattages are noted on the bulb.
2. Some electrical motors surge in power when first started. Your VEVOR Switch has watt meters to monitor these start-up surges without impeding generator performance.
3. Load balance is achieved by pre-determining chosen circuits. Try to distribute loads with similar wattage requirements equally on the left and right sides of the switch. For example, on a 10-circuit switch, place the refrigerator on circuit A and the freezer on circuit F. Attempt to balance loads to within 1000W on each side.

Appliance Wattage Examples

Installing 120-Volt Circuits

Tools Required: Electric drill, Screwdriver, Wire cutters/stripper, Hammer, Four anchors and screws, Yellow wire connectors (6 or 10pcs depending on model), Red wire connectors (4pcs for 20A and 30A hard-wire models).

1. Locate Circuit Breaker: From your plan, find the circuit breaker to be connected to VEVOR transfer switch circuit "A". Use the refrigerator circuit as an example. Turn the circuit breaker OFF. Loosen the lug securing the wire and remove the wire.

⚠️ WARNING: Transfer switch circuits with 20 amp breakers must be installed to circuits using 20 amp breakers in your load center. Transfer switch circuits with 15 amp breakers can be installed on either 15 or 20 amp breakers in the load center. ONLY 30 AMP CIRCUITS FROM YOUR LOAD CENTER SHOULD BE INSTALLED ON 30 AMP CIRCUITS ON THE TRANSFER SWITCH (SP-ZH352510(50A-10) ONLY).

2. Route Wires: Find both the red and black VEVOR transfer switch wires labeled "A". Route both wires close to the selected circuit breaker.
• a) Trim, strip, and install the red VEVOR transfer switch "A" wire into the circuit breaker, securely tightening the breaker lug.
• b) Place the black VEVOR transfer switch "A" wire and the hot wire from the circuit breaker (removed in step 1) together up the side of the load center.
• c) After removing 5/8" of insulation from the black VEVOR transfer switch "A" wire, insert both wires into an approved wire connector and fasten together. Push the wires back into the wiring compartment of the load center.

d) Repeat step 2 for remaining circuits, considering the following:

• See the section on 240-volt circuits and the removal of handle ties if 240-volt circuits are not required.
• Remember to "balance the load" by dividing appliances requiring higher wattage between the left and right sides of the transfer switch.

Installing 240-Volt Circuits

VEVOR transfer switch products provide circuits for connecting 240-volt appliances that use 2-pole branch circuit breakers in your load center. These VEVOR transfer switch circuits for 240-volt operation have a handle tie installed that connects two circuit selector switches together.

• 6 Circuit Model: Circuits C & F
• 10 Circuit Models: Circuits D & I, Circuits E & J

⚠️ WARNING: Circuits used for multi-wire branch circuits are not available for 240-volt circuits.

If you do not wish to use designated circuits as 2-pole circuits, remove the handle tie by removing the two screws. For example, circuits E & J of model SP-ZH352510(50A-10) and a 2-pole 20A well pump circuit in the load center will be used.

1. Turn off the double-pole breaker in the load center.
2. Loosen the screws securing each wire to each circuit breaker and disconnect the wires.
3. Trim, strip, and securely install the red VEVOR transfer switch "E" wire into one side of the 2-pole circuit breaker.
4. Place the black VEVOR transfer switch "E" wire and one of the hot wires from the circuit breaker up the side of the load center. Insert both wires into an approved connector and fasten together. Push wires back into the wiring compartment.
5. Trim, strip, and securely install the red VEVOR transfer switch "J" wire into the remaining side of the 2-pole circuit breaker.
6. Place the black VEVOR transfer switch "J" wire and the remaining hot wire from the circuit breaker up the side of the load center. Insert both wires into an approved connector and fasten together. Push wires back into the wiring compartment.
7. Ensure a handle tie is connected between the E & J circuit selector switches.

Completing the Installation

1. Install Neutral Wire: Once all desired circuits are wired, install the VEVOR transfer switch white (neutral) wire. Select an unused hole on the neutral bar in the load center. Cut and strip the wire appropriately, insert it into the hole, and tighten securely.
2. Install Ground Wire: Install the VEVOR transfer switch green (ground) wire into an unused hole in the ground bar in the load center. Select an unused hole, cut and strip the wire appropriately, insert it into the hole, and tighten securely.
3. Replace Load Center Cover: Replace the load center cover. All circuit breakers, including the MAIN, can now be turned on.
4. Set Switches: All VEVOR switches should be in the "Line" position. The "Off" position is generally not used.
5. Label Circuits: Fill out the provided chart describing each emergency circuit and its corresponding circuit breaker. Place this label on or near your VEVOR transfer switch for easy reference.

VEVOR Manual Transfer Switch Circuit Label

Wiring the VEVOR Switch to the Generator

Wiring the generator to the VEVOR switch requires an outdoor Power Inlet box, an electrical junction box, and permanent wiring. Mount an electrical junction box six (6) inches below the transfer switch. Route the switch input wires through a 1/2" Type B conduit and into the junction box, using an appropriate 1/2" fitting to secure the conduit.

Install four-conductor (Hot, Hot, Neutral, Ground) permanent wiring between the junction box and power inlet box according to local code requirements.

Connect the VEVOR switch input wires to your permanent wiring as follows:

1. blue (1) to red (hot)
2. blue (2) to black (hot)
3. white to white (neutral)
4. green to ground

Use appropriate wire connectors for the connections. Check your local electrical codes for grounding and bonding requirements for the junction box.

Diagram Description: A schematic shows the system layout: Power Generator connected to a Rain Tight Power Inlet Box, which connects to an Electrical Junction Box. The junction box is wired to the VEVOR switch, which is then wired to a Loadcenter. Wiring paths are indicated.

⚠️ Caution! Locate inlet box a minimum of 10 feet away from any opening in the building that would allow carbon monoxide to enter the premises.

Operation

Transferring from Utility Power to Generator Power

1. Under normal utility power, switch positions should remain in the "LINE" position. The "OFF" position is generally not used. The "GEN" positions are used when utilizing your generator power source. Keep EGS circuit breakers set in the ON position at all times.
2. When testing or switching to generator power after an outage, ensure all switches are in the "LINE" position.
3. Plug your power cord set into your generator by aligning the male prongs with the female terminals of the generator's receptacle, push the connector in, and twist clockwise to lock. Align the female socket of the cord set into your remote power inlet box, push it in, and turn clockwise to lock.
4. Move your generator outdoors before starting it up. Check fluids and fuel, and start the generator according to manufacturer instructions. Allow approximately 10 minutes for the generator to warm up.
5. At your VEVOR transfer switch, move one circuit to the "GEN" position, noting the wattage used on the watt meter. While monitoring the load, flip each circuit—one at a time—to the "GEN" position. Balance the loads so that both meters read approximately the same, aiming for a difference of within 1000W. Do not switch on more loads than your generator can supply.
6. Test generation and transfer switch regularly to ensure proper operation.

Note: Wattage must not exceed the maximum printed on the meters.

Transferring from Generator Power to Utility Power

1. Return all circuit selector switches to the LINE position.
2. Follow the procedures in the generator owner's manual to turn off the generator.
3. Unplug the power cord.

Notes on Models Without Watt Meters: Check the nameplate on each appliance or motor and note its load. Determine the total running wattage of your generator. During an emergency with the generator running, circuit selector switches should be in the OFF or LINE position when a particular load is not needed. Failure to limit the total load to the generator's running wattage may cause the generator to stall or create an undervoltage condition that could damage an appliance motor.

Troubleshooting