[Lowfer] Here's a good one!

Fri, 17 Oct 2003 14:09:10 -0500

Well I have not seen what you have there but would definitely run a ground
wire to the bottom fitting. Sparks and any kind of fuel are not good.

Just my thoughts, your mileage will vary.

Mike>WE0H

-----Original Message-----
From: [email protected] [mailto:[email protected]]
On Behalf Of Bill Ashlock
Sent: Friday, October 17, 2003 12:22 PM
To: [email protected]
Subject: [Lowfer] Here's a good one!

I was just called out to the mfg floor to look an unusual HV problem (and,
Peter, I guarantee this is NOT a hypothetical problem). They use a electric
pump and a filter to remove impurities from an expensive type of oil. The
oil is pored in a 5 gal polyethylene bucket and circulated through the pump
and filter. The hoses used have a stainless steel jacket and are grounded
electrically to the frame that supports the pump and filter. The pump is
grounded properly to the 110v outlet. There is a 1/2 inch metal pipe elbow
in the bottom of the bucket not connected to anything.

OK, after the oil has been allowed to circulate in the bucket for maybe 15
seconds they can touch one of the metal hoses to the elbow and draw up to a
1/2" spark within the oil!! It's definitely static electricity. Anyone heard
of anything like this?? I've been asked to determine if there are any safety
issues in this process.

Bill A

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