One disconnect for both primary and secondary for small transformer

AppleJaxJap · Jan 1, 2022

any issues with this installation?

[ol 1]
[li]I know that the disconnect would need to be labeled for different voltages.[/li]
[li]I Disconnect, XMFR, and Load are all located on the same steal light pole.[/li]
[li]I All fuses 600V class.[/li]
[li]I Disconnect and XMFR are within a foot of each other. Load is on top of light pole[/li]
[/ol]

It's wacky as hell but not sure what code would apply for the One disconnect for both primary and secondary for small transformer.

TIA

This is your life and its ending one moment at a time.

RRaghunath · Jan 2, 2022

I don't see a problem.

itsmoked · Jan 2, 2022

Unclear why you're bothering since turning off the transformer already turns off the 6A load.

The only thing I see wrong is that you need to bond the separately derived 120V by connecting it to earth. It's unclear in your drawing if you have or it's just a coincidence.

Keith Cress
kcress -

http://www.flaminsystems.com

Palletjack · Jan 2, 2022

Fuses for transformer, NEC 450.3(B)
For the disconnects see 300.3(1)
Also see 404.8(B) for barrier protection.

The one disconnect for transformer primary may be permitted depending on length of secondary.
See 240.21(C)(1).

That primary fuse is over 125% of full load amps on primary so secondary protection is required. Lower the fuse size.
Can you get by with a 3 amp fuse on the primary?

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One disconnect for both primary and secondary for small transformer

AppleJaxJap

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RRaghunath

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itsmoked

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Palletjack

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