[RFI] Galaxy Grow Light Ballast Update

[Tom Thompson]

Jim,

This choke is on the *Lamp *side of the ballast, not on the *Line *side, 
so it is unclear what a short circuit among any of the wires on the Lamp 
side will do.  It largely depends on the ballast circuitry.

Tom

On 2/1/2016 2:58 PM, Jim Brown wrote:
> On Mon,2/1/2016 1:19 PM, Tom Thompson wrote:
>> I respectfully disagree.  The choke in the green wire and the common 
>> mode choke both are 300uH.  A short circuit current between the hot 
>> and the green wire would pass through both chokes in series. At 60 Hz 
>> the total impedance is 0.2 ohms which is not going to affect the 
>> breaker or fuse blowing.
>
> But it's NOT 60 Hz, it's an impulse. And if the choke is effective at 
> killing RFI, it's got significant resistive impedance at the 
> frequencies of that impulse.
>
> The question is not WILL it blow the fuse/breaker, but will it blow 
> FAST ENOUGH to protect someone from electrical shock.
>
> 73, Jim
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