Also make sure the equipment you use and that of which you want to service use polarized plugs, if not be ultra cautious. Upgrade to polarised plugs.
Potentiallyincorrect ---> In countries like Norway and Sweden there is no such thing as a polarized plug or wall socket,
plugs can be oriented whichever way you want in the wall socket, plus most older homes have both grounded and un-grounded wall sockets.
In Norway orientation doesn't matter since the system is 120+120 Vac.
Sweden has 240 Vac Live. Neutral is connected to Protective Ground in the breaker box.
In Sweden therefore, it is perfectly possible to connect a scope and the Device Under Test opposite of each other.
plugs can be oriented whichever way you want in the wall socket, plus most older homes have both grounded and un-grounded wall sockets.
In Norway orientation doesn't matter since the system is 120+120 Vac.
Sweden has 240 Vac Live. Neutral is connected to Protective Ground in the breaker box.
In Sweden therefore, it is perfectly possible to connect a scope and the Device Under Test opposite of each other.
Good point, that's why its crucial to measure before connecting instrument ground clips. Measure instruments and equipment grounds to earth too. Nobody wants a buzz or a bang.