Maddox switchgear comes in pad-mounted and metal-enclosed configurations for your padmount or unit substation transformer.

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One padmounted switchgear unit and two metal-enclosed switchgear units


Green Pad-mounted switchgear with door open


  • 15 kV double-door design
  • Up to 4 bays
  • Multiple switch and fuse configurations available
  • UL listed
  • Meets or exceeds IEEE C37.74
  • Munsell Green hi-gloss finish suitable for heavy-duty applications
  • Ideal for publicly accessible outdoor installations
    • Low-profile
    • Tamper-proof
    • Lockable

Standard specs

  • Nominal: 14.4 kV
  • Maximum design: 15.5 kV
  • BIL: 95 kV
  • Main bus continuous: 600 amps
  • Load interuppting: 600 amps
  • Short-circuit RMS symmetrical: 25 kA
  • ​3-time duty cycle fault closing RMS asymmetrical: 40 kA
  • ​Frequency: 60 hertz
  • Maximum altitude: 3300 feet
  • Fuse unit: type DBU, 15 kV, standard speed (E)

Optional upgrades

  • Live-front designs
  • 6 compartment option (up to 5 switch and 5 fuse arrangements)
  • 25 kV designs
  • DBU fuse speed variations: slow "E" and "K"


Maddox metal-enclosed switchgear with door open


  • 5/15 kV
  • General purpose switches
  • Current-limiting clip-lock fusing options (up to 600E for 5 kV applications and up to 300E for 15 kV applications)
  • Optional close-couple kit
  • UL listed and CSA approved
  • Meets or exceeds IEEE C37.20.3
  • 11-gauge steel construction
  • ANSI 61 gray powder coating for a durable, lasting finish

Standard specs

  • Maximum rated voltage: 15 kV
  • Main bus continuous: 600 Amps
  • Fault close asymmetrical: 40 kA
  • Momentary switch closed asymmetrical: 40 kA
  • 2 second short-time Current RMS symmetrical: 25 kA
  • BIL: 95 kV
  • Space heater circuit w/ thermostat (requires 120 VAC external power source)
  • Provision for kirk key interlock
  • Mechanism and contacts: copper-silver plated
  • Frequency: 60 hertz
  • Maximum altitude: 3300 feet
  • Line terminals: ANSI segment 3
  • Load terminals: ANSI segment 1
  • Enclosure: NEMA 3R, outdoor/indoor

Optional upgrades

  • 27 kV designs
  • Dry-contact kit (2 normally open, 2 normally closed)
  • Customer metering
  • ​Multi-bay lineups
  • ​Surge arresters
  • ​Convenience light
  • ​Space heater switch
  • ​Duplex receptacle
  • ​Run back bus

Get Started
We make it easy to get a quote and order a switchgear. Follow the steps below to get started.

Request a Quote

Call or fill out the form below to get a quote. Most quotes are turned around the same or next-day.

Place your order

Send us a purchase order, or give us a credit card number, and your dedicated customer service rep will send you an order confirmation and answer any questions you may have.

Receive your switchgear

We’ll handle all transportation and logistics. Maddox has the shortest lead times in the industry so you can get the power on when you need it.

"We ordered transformers to use for our industrial equipment applications due to market shortages for our standard stepdown transformers. Delivery was incredibly quick and products look and operate without issue. Priced very well in comparison to other outlets - very happy to utilize Maddox in the future for our continued needs."

Todd Griffieth, ops manager

"I have purchased dozens of Maddox transformers, both low voltage dry-types and large reconditioned medium voltage units. Always great service and quality builds, with faster than industry standard lead-times."

Eric Raybould, distributor

"Quick delivery with helpful friendly staff. Great service and highly recommended. A great company to work with on all your transformer needs."

Austin Spiegel, project manager

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Maddox padmounted switchgear in shop