Probewell Lab Inc.
Page •50
Form 3S
Form 3S single-phase, 120 volts two-wire with CT is also compatible.
Caution: Never open a circuit-closing device if current is flowing in the CT primary.
Serious personal injury may result.
Note: Some older-design 3S, 240 V forms have higher impedance and will not reach
full HL when tested with MT-1/WT3. However, the socket will test as high as it can.
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