Voltage

[TheCrow]

Checking voltage In a building .A to b phase 240 volt
A to ground 235 volt
B to c phase 243 volt
B to ground 246 volt
C to a phase 242 volt
C to ground 10 volts
What type of service is this .

 

[zbang]

Looks like a 240 delta where the C phase is either faulted to ground or (badly) intentionally grounded.

 

[ptonsparky]

SEWAG It is supposed to be an ungrounded Delta but we have a fault on C.

 

[TheCrow]

Looks like a 240 delta where the C phase is either faulted to ground or (badly) intentionally grounded

 

[TheCrow]

The service is connected to a transformer feeding a panel with a neutral . Wanted to see if a generator can be connected with a manual transfer switch .

 

[ptonsparky]

The service is connected to a transformer feeding a panel with a neutral . Wanted to see if a generator can be connected with a manual transfer switch .

What is the information on the transformer?

 

[Little Bill]

@TheCrow
What is your relation to the electrical field?

 

[Jraef]

The service is connected to a transformer feeding a panel with a neutral . Wanted to see if a generator can be connected with a manual transfer switch .

If this is the case, something is definitely wrong. 240V delta would only have a Neutral if it were a "high leg" system, which is usually B phase, so A-C phase is split with a grounded center point to make 120V from A or C to N.

If C is at nearly ground potential, that winding is ether shorted, or someone put in a Corner Grounded Delta transformer, in which case there would NOT be a Neutral at all to connect to that panel.

One way or another, this is messed up.

 

[LadyDi]

Clear the fault before considering adding anything to the panel. Otherwise, risk injury or death.