McMaster-Carr logo
    Filter by
    Switching Voltage
    Industrial Info Snippet
    Switching Current
    Industrial Info Snippet
    Number of Switches
    Electrical Phase
    Maximum Power
    Total Number of Circuits Controlled
    Knockout Trade Size
    Industrial Info Compare
    Switch Type
    Transfer Switch Type
    Power Cord Included
    Electrical Connection
    Housing Width
    Number of Circuits Controlled
    Housing Material
    Environment
    Enclosure Rating
    Industrial Info Compare
    Switch Designation
    Industrial Info Compare
    Housing Finish
    Conduit Trade Size
    Industrial Info Compare
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    DFARS Specialty Metals
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Comments
    E-mail address (if you would like a response)
    5 Products

    Manual Transfer Switches

    Image of Product. Front orientation. Transfer Switches. Manual Transfer Switches, NEMA 1.
    Image of Product. Front orientation. Transfer Switches. Manual Transfer Switches, NEMA 1 with NEMA 3R Power Inlet Box.
    Image of Product. Front orientation. Transfer Switches. Manual Transfer Switches, NEMA 3R.

    NEMA 1

    NEMA 1 with NEMA 3R

    Power Inlet Box

    NEMA 3R

    If there’s a power outage, flip the toggle for each circuit on these switches to backup power. Each circuit can also be turned off completely. To prevent injury and damage to your generators, they are open transition, meaning the contacts disconnect from one power source before connecting to another. This is also known as break-before-make switching.
    Use them with a portable generator.
    NEMA 1—NEMA 1 switches should be used indoors.
    NEMA 1 with NEMA 3R Power Inlet Box—NEMA 1 switches with a power inlet box create a connection point between the switch and a portable generator. These switches should be used indoors. But their inlet box is rated NEMA 3R, so it can be mounted on the outside of an exterior wall.
    NEMA 3R—NEMA 3R switches can be used outdoors since they seal out rain, snow, and sleet.
    Key Lock—Switches with a key lock prevent unauthorized changes to the switch.
    Housing
    Mounting
    Max. Power,
    W
    Switching Current
    (No. of Switches)
    Circuit Breaker Breakthrough
    Current, amp
    Electrical
    Phase
    Housing Material
    Ht.
    Wd.
    Dp.
    Generator Connection
    NEMA Type
    Generator Connection
    California Std. Style
    Power Cord
    Lg., ft.
    Fasteners
    Included
    No. of
    Holes
    Hole
    Dia.
    Features
    Certification
    Specs. Met
    Each
    NEMA 1
     
    10 Circuits Controlled
    7,50030 amp @ 240V AC (1 DPDT)
    20 amp @ 240V AC (1 DPDT)
    15 amp @ 120V AC (6 SPDT)
    10,000SinglePowder-Coated Steel11 1/4"11 3/4"4 3/4"L14-30
    Yes51/4"UL Listed
    UL 1008, NEC Article 70200000000000000
     
    NEMA 1 with NEMA 3R Power Inlet Box
     
    6 Circuits Controlled
    7,50020 amp @ 240V AC (1 DPDT)
    15 amp @ 120V AC (4 SPDT)
    10,000SinglePowder-Coated Steel12"8 3/4"6"L14-30
    10Yes51/4"UL Listed
    UL 1008, NEC Article 7020000000000000
     
    10 Circuits Controlled
    7,50020 amp @ 240V AC (1 DPDT)
    20 amp @ 120V AC (2 SPDT)
    15 amp @ 120V AC (6 SPDT)
    10,000SinglePowder-Coated Steel11 1/4"11 3/4"4 3/4"L14-30
    10Yes51/4"UL Listed
    UL 1008, NEC Article 7020000000000000
     
    NEMA 3R
     
    10 Circuits Controlled
    7,50020 amp @ 240V AC (1 DPDT)
    20 amp @ 120V AC (2 SPDT)
    15 amp @ 120V AC (6 SPDT)
    10,000SinglePowder-Coated Steel12 3/4"12"5"L14-30
    Yes51/4"Key LockUL Listed
    UL 1008, NEC Article 7020000000000000
    12,50020 amp @ 240V AC (1 DPDT)
    20 amp @ 120V AC (2 SPDT)
    15 amp @ 120V AC (6 SPDT)
    10,000SinglePowder-Coated Steel12 3/4"12"5"CS6375Yes51/4"Key LockUL Listed
    UL 1008, NEC Article 7020000000000000
     
    back to top