Transfer switch

B

bob_stemple

Member
Location
LHC AZ
Occupation
retired
I need 240v 20a outlet in the garage for a HF amplifier that will draw 10a. I'm wondering if this setup would be a safe way to go. Since I already have 240v 30a hot water tank in the garage, I would like to add a transfer switch (on-off-on) in the garage using a GE 100 Amp 240-Volt Non-Fused Emergency Power Transfer Switch and take the wiring from the hot water tank and connect to the load side of the transfer switch. Then wire one side of the switch to the hot water tank and the other for the outlet to run a hf amplifier that would draw 10a max.
 
I suppose that will work except that the amplifier is fused at 30 amps which may be too high. You could add a small breaker box with a DP 20 amp breaker.

It seems, if possible, a new circuit would be cheaper
 
This could be a non coincident load application.
The 100 amp TS is larger than needed , will it accept 10 AWG?
For your 20A HF load, is it a plug in? If so that would be an issue on a 30A BC
 
bob_stemple said:
I need 240v 20a outlet in the garage for a HF amplifier that will draw 10a. I'm wondering if this setup would be a safe way to go. Since I already have 240v 30a hot water tank in the garage, I would like to add a transfer switch (on-off-on) in the garage using a GE 100 Amp 240-Volt Non-Fused Emergency Power Transfer Switch and take the wiring from the hot water tank and connect to the load side of the transfer switch. Then wire one side of the switch to the hot water tank and the other for the outlet to run a hf amplifier that would draw 10a max.
Click to expand...
I think you meant line side not load side.
 
tom baker said:
This could be a non coincident load application.
The 100 amp TS is larger than needed , will it accept 10 AWG?
For your 20A HF load, is it a plug in? If so that would be an issue on a 30A BC
Click to expand...
Yes, the amp is a plug in. I'll have to do more research on the TS and make sure it will accept 10 AWG.
 
Dennis Alwon said:
I suppose that will work except that the amplifier is fused at 30 amps which may be too high. You could add a small breaker box with a DP 20 amp breaker.

It seems, if possible, a new circuit would be cheaper
Click to expand...
It would be possible, but I'm not keen on going into the attic at my age. I didn't even like it at a younger age. That is why I worked in industrial electrical for much of my career. Hiring an electrician to do this will be much more costly than my solution.
 
bob_stemple said:
The TS is designed to apply power from the power company or generator to the home, so the center is labeled as the load side. But I will be connecting it up as the line side.
Click to expand...
Ok. I got turned around there.:sneaky:
 
bob_stemple said:
Yes, the amp is a plug in. I'll have to do more research on the TS and make sure it will accept 10 AWG.
Click to expand...
You can always use crimp lugs or change them to lugs that will accept 10.
They also make 60 and 30 amp transfer switches.
 
Little Bill said:
What is a hf amplifier?
Click to expand...
It amplifies the RF (radio frequency) power of a radio signal. HF (high frequency) signal between 6 meters to 160 meters. My amp is a 1-kilowatt amp. 55 watts in will produce 1000 watts output. It will run on 120v, but runs more efficiently on 240v.
 
You could replace the water heater disconnect with a sub-panel with a breaker interlock.

Cheaper and simpler than a transfer switch, and takes care of the 20a-circuit concerns.
 
I gave that some thought and still may go that way. I was just thinking if I was talking on the radio using the amp and the hot water tank kicked in I would be close to drawing 30amps on the circuit.
 
bob_stemple said:
I gave that some thought and still may go that way. I was just thinking if I was talking on the radio using the amp and the hot water tank kicked in I would be close to drawing 30amps on the circuit.
Click to expand...
That's the reason I suggested a breaker interlock.

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