when tripped. If the Product fails to trip the GFCI, the GFCI may be faulty or
mis-wired. Consult an electrician.
• When testing a GFCI installed in 2-wire systems (no ground wire available), the
Product may give a false indication that the GFCI is not functioning properly. If
this occurs, recheck the operation of the GFCI using its test and reset buttons.
The GFCI button test function demonstrates proper operation.
• On the ST120+, the beeper only makes a sound if voltage is present and the
beeper is turned on. Do not rely on the beeper to indicate the presence of
voltage.
Symbols
Table 1 explains the symbols used on the Product and in these instructions.
Table 1. Symbols
Symbol
Description
W
WARNING. RISK OF DANGER.
X
WARNING. HAZARDOUS VOLTAGE. Risk of electric shock.
»
Consult user documentation.
J
Earth
~
This product complies with the WEEE Directive marking requirements. The affixed
label indicates that you must not discard this electrical/electronic product in domestic
household waste. Product Category: With reference to the equipment types in the
WEEE Directive Annex I, this product is classed as category 9 "Monitoring and
Control Instrumentation" product. Do not dispose of this product as unsorted
municipal waste.
