[TowerTalk] Bonding and geounding

[Paul Christensen]

Shane,

Jumping in here...Like you, I use an advanced device for measuring earth
resistance.  It's a clamp-on earthing tester from AEMC.  But if you're
discussing bonding resistance, a Simpson 260 or DMM should be fine. One of
the most accurate tests for bonding resistance is a DMM with 4-wire Kelvin
probes.  I cannot imagine a licensed electrical contractor losing a license
using that method of bonding measurement.

Paul, W9AC



-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of Shane
Youhouse
Sent: Wednesday, January 13, 2016 8:13 PM
To: towertalk at contesting.com
Subject: [TowerTalk] Bonding and geounding

Jim,

Having taught bonding classes for a decade,  you really should know that a
Simpson 260 is completely worthless for ground conductivity measurements.

Just saying.   We in the electric industry use a high voltage megger to do
this.

Mine runs at approximately 500 volts DC.

This is used in commercial and industrial electrical work.   I am also
required to Meg any ground connection at a residence to under 25 ohms.

Where I to bust out my Simpson  meter,  I'd lose my license.

Caught you stating you used a Simpson for ground resistance measurements
before.   Forgot to correct ya on that one.

--Shane
KD6VXI
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