Transfer Switch

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About

  • Double throw safety switch - [1]
  • UL standards for double throw safety switches stipulate 4000 cycles rating at 100% power. Should be more at partial power. [2]

Design

  • Must use several SPDT for creating an automated DPDT relay? Ie, with logic, you turn certain contacts on, and certain contacts off.

Sourcing

Manual

  • GE 100A $200 [3]
  • Eaton 100A
    • Amazon $200 [4]
    • Double throw $310 HD [5]
  • $86 - CSA but non-UL? [6]. You can look up the CSA listing here - it is CSA listed as file # 025483_0_000 [7]

Auto

  • 63A, automatic, 3 phase or 4 pole - [8]
  • 63A auto, 1 phase - [9]

Videos

  • Notes: 'not meant to be switched every day'