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Re: [RFI] Galaxy Grow Light Ballast Update

To: Rfi List <rfi@contesting.com>
Subject: Re: [RFI] Galaxy Grow Light Ballast Update
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Mon, 1 Feb 2016 13:58:08 -0800
List-post: <rfi@contesting.com">mailto:rfi@contesting.com>
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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