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© Copyright Brainboxes Limited 2010 Page 40 of 47
Configuration B)
Configuration A) The circuit common of the equipment is connected to protective ground, at one point only
by a 100 Ω, ±20% resistor with a power dissipation rating of 1/2W. An additional provision may be made for
the resistor to be bypassed with a strap to connect signal common and protective ground directly together
when specific installation conditions necessitate.