3 phase 130 breaker?

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Might not be a 3 phase load, it may be a 100A 240V single phase load that must be tied to a 30A 120V load so that if either breaker trips, it turns the other one off. 15HP 230V 1 phase fan and 30A strip heater comes to mind.
 
That 30A single pole is either a Eaton, or Siemens, classified breaker, never saw much use for them, if you have a QO panel, the Visi-trip flag can be handy.
 
Jraef said:
Might not be a 3 phase load, it may be a 100A 240V single phase load that must be tied to a 30A 120V load so that if either breaker trips, it turns the other one off. 15HP 230V 1 phase fan and 30A strip heater comes to mind.
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But that handle tie cannot be relied on to provide a common trip!
It could be an asymmetric MWBC. We can't tell for sure since we cannot see the neutral configuration.
Or it could be a machine or equipment load that requires both the two pole and the single pole circuit to be disconnected to be safe.
Or it could be a feeder to a sub panel that serves one three phase load and multiple single phase (L-N or L-L) loads. This would save a small amount of copper, for whatever that is worth compared to the non-standard nature of the configuration.
 
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Could be they just needed a place to keep that cut nail.

Roger
 
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