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Home Brew Forums > Home Brewing Beer > Electric Brewing > Strange issue with 240v legs. 120v on both, no 240v
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Old 12-02-2010, 06:52 PM   #1
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Default Strange issue with 240v legs. 120v on both, no 240v

So I am brewing today and on both of my boil kettles one of the elements are not working. When I test the relays I have 120v on each leg but when I measure across both legs I get weird readings of 7-20v. If I turn the relays off I get 240v across the legs but, turn on the relay again and I get the strange readings.

I have two 60amp circuits feeding each boil kettles. I have 3 element in each kettle. This seems to be a new issue. My last 6 brews everything worked fine.

Any suggestions?

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Old 12-02-2010, 06:55 PM   #2
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What are your elements? Watt and voltage?

disconnect the elements from the relays and take an ohm reading across the element. What do you have. I know it sounds weird to lose two elements at the same time, but weirder things have happened in the wonderful world of electronics.

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Old 12-02-2010, 07:08 PM   #3
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Elements are 4500w 240v. The elements all test out as working.

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Old 12-02-2010, 07:16 PM   #4
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Ok problem solved. I was not thorough enough in my testing. I had two blown fuses.

The weird thing was I was getting voltage across the the fuses. So i just assumed they were ok. I did not test the ohms across them. Sure enough they were dead. All is well all my elements are firing.

Thank you.

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Old 12-02-2010, 07:17 PM   #5
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Fuses should always be removed from the circuit and tested alone with an ohm reading or continuity check.

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Old 12-03-2010, 07:15 PM   #6
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If you get avoltage reading across a single fuse, it is blown. There will be no voltage differential across a good fuse.

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