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Asco 300 MTQ Manual Transfer Switch (1Ph, 800A)


SKU: H03MTQA20800F00M Categories , Tag Brand:
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This ASCO Series 300 (MTQ) Manual Transfer Switch is designed to manually transfer single phase loads up to 800A, and includes an integrated generator docking station. Ideal for commercial, telecom, municipal, healthcare, and light industrial applications requiring a roll-up generator for back-up power.


  • Provides a total temporary power connection and transfer solution in a single UL-1008 listed unit.
  • Ideal for manually switching to a temporary generator during a power outage.
  • Can be used to satisfy NEC 700.3 requirements to provide connection to a temporary generator while a permanent generator is being serviced.
  • Manual operating handle with center-off position.
  • ASCO’s reliable, field-proven, transfer switching technology.
  • Modular compact design is easy to install and maintain.
  • Designed to handle the demands of motors and high inrush currents.
  • Utilizes 16 Series Cam-Lok connectors for quick connection to a temporary generator.
  • Floor-mounted NEMA 3R secure outdoor enclosure standard.
  • Optional Accessory 170 offers LED indicators and Form C contacts for switch position and source availability, and the further options of phase rotation monitoring, a maintained engine start switch, and an IO module for building management system integration (See Accessories below).
  • UL 1008 Listed.


Asco 300 Manual Transfer Switch Brochure

Asco 300 Frame H Operator’s Manual

Asco 300 MTQ Frame H 800A Drawing

Asco 300 Warranty


Please Call to Order Transfer Switches With These Options:

  • Other 60Hz single phase voltages – up to 600 VAC.
  • 50Hz frequency/voltages.
  • Other enclosure: NEMA 3RX 316-Stainless Steel secure outdoor enclosure.

Please Note: Some Specs (including withstand ratings, dimensions, and weights) may vary with some of the options above.


  • Accessory 170 User Interface/Annunciation – Offers LED indicators and Form C contacts for transfer switch position and source availability. Can be configured with or without phase rotation monitoring, a keyed or unkeyed maintained engine start switch with common alarm LED/contact, and an IO module for building management system integration. (Factory-installed – must be ordered with the transfer switch)
  • Accessory 44A Strip Heater – Prevents condensation and freezing of condensation. External 120 volt power source required. Thermostat included. (Available as a factory-installed option or can be installed later as a field kit)
Model Number






Withstand Rating @ 240V

Source 1 & Load Lug Connections

Source 2 Camlock Connections

Frame / Cabinet Type

Service Entrance Rated

Full Dimensions HxWxD (inches)




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