|
There is no polarity as such, but it is a hot chassis set, meaning one side of the AC line is connected to the metal chassis.
If the cord is plugged in so that the neutral side is connected to the chassis no problem, if the live side is connected to the chassis it can be a dangerous situation.
If you touch the chassis and a ground source, such as a water pipe or a concrete floor in your bare feet you can get 120 volts across your body, this is why an Isolation transformer was suggested earlier in this thread.
I've worked on plenty of hot chassis sets without a transformer but it requires that you pay attention to what you are doing, one hand in your pocket when touching the chassis, wear rubber soled shoes, don't stand in water and so forth.
You can also mark the cord and the set so you can be sure the neutral side is connected to the chassis.
|