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Line Impedance Measurements
There are three tests within the line impedance menu.
Measurement Icon
Hot conductor impedance
Neutral conductor impedance
Ground impedance
The hot conductor impedance measurement is the first measurement within
this menu selection. Pressing the side arrow button (→ ) moves the unit
from measurement to measurement within the line impedance menu.
Pressing the down arrow button (
↓
) returns the unit to the first menu selec-
tion – Line Voltage.
Troubleshooting Tips
Measurement Expected Problem Possible Possible
Result Causes Solutions
Hot conductor <0.48Ω/ High - Too much load - Redistribute the
impedance foot of 14 conductor on branch circuit load on the circuit
gauge wire impedance - Undersized - Check code
<0.03Ω/ wire for length of requirements and
foot of 12 run re-wire if necessary
gauge wire - High resistance - Locate high
<0.01Ω/ connection within resistance
foot of 10 the circuit or at connection/device
gauge wire the panel and repair/replace
Neutral <0.48Ω/ High - Too much load - Redistribute the
conductor foot of 14 conductor on branch circuit load on the circuit
impedance gauge wire impedance - Undersized wire - Check code
<0.03Ω/ for length of run requirements and
foot of 12 re-wire if necessary
gauge wire - High resistance - Locate high
<0.01Ω/ connection within resistance
foot of 10 the circuit or at the connection/device
gauge wire panel and repair/replace
Ground <1Ω to High - Too much load - Redistribute the
impedance protect ground on branch circuit load on the circuit
personnel impedance - Undersized - Check code
<0.25Ω wire for length requirements and
to protect of run re-wire if necessary
equipment - High resistance - Locate high
connection within resistance
the circuit or at connection/device
the panel and repair/replace
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