Load Break Switch & Fused Cut out
Load Break Switch & Fused Cut out
(OP)
Please correct me if I am wrong.
In case of distribution voltages up to 25 KV, utilities use fused cut outs for pad mounted transformer or lateral tap switching. But after 25 KV, A standard load break switch or disconnect is required to do the same job ?
I am sure, utilities dont have to abide by local Electrical safety authority regulations. But, Will a fused cut out at 13.8 KV for a commercial premises can act as a means of disconnect or we need to provide a three phase disconnect.
I will be talking to local electrical inspector but dont want to be completely dumb about the trend of these kinds of installations.
I would appreciate, if you guys could advise.
Thanks






RE: Load Break Switch & Fused Cut out
But if your question concerns meeting NEC requirements for main service disconnect or adequate disconnecting means, it is all irrelevant because owners cannot rely on utility-owned switches, fuses, etc to satisfy NEC requirements.
RE: Load Break Switch & Fused Cut out
Unless you are willing to pay for a recloser, or some form of automated disconnect switch with fault sensing capabilities, the fused cutouts are your best bet.
Is this a service that you are planning on having disconnected - reconnected frequently? or under load?
If you will be doing switching under load, then fused cutouts are not the best option.
Happiness is a way of travel, not a destination.
RE: Load Break Switch & Fused Cut out
My system is 12,470Y/7200 and we do not typically use switches unless the customer has special needs/requests.
The utility safety code is the NESC, IEEE, ANSI, OSHA, and any other federal agency that decides it wants a piece of the action.
The NEC, and most local inspectors jurisdiction, starts at the point of metering.
Is you utility providing the transformer?
Happiness is a way of travel, not a destination.