They are not at all safe and are junk that needs to be recycled and never installed even in a barn let alone a home. Zinsco company went out of business partly because it was discovered that their breakers did not trip when they were supposed to. For this reason they are nothing but a fire hazard and are not to be trusted to protect the wiring in your home or your family from a fire. Do not use any Zinsco or FPE service panel. Destroy this panel so that no one can ever use it.
Yes
To be safe
It depends on the legislation of the country you are in.
Shut it off and lock it out. Sign the lockout card and keep your key with you.
Portable appliance testing (PAT) is basically a method of testing (using a device and by sight) that any electrical equipment, cables, devices, machinery is safe to use.
In front of any electrical equipment, there has to be a free space of 1 metre or 3 feet. This is so that the equipment can be worked on without any obstructions being in the way. A clean work space is a safe work space.
As Safe as Yesterday Is was created in 1969-08.
It is nonaddictive and completely safe
As with every electrical code around the world, the primary objective is the safe installation of electrical equipment that is connected to the electrical grid. Overall the objective is keeping everyone and everything safe in conjunction with the use of an electrical supply source.
yes
Yes
Yes
To determine if an old home is in need of electrical repair, call a professional. Either a professional electrician or a home inspector can let you know if your electrical wiring is safe and up to code.
There is a magnetic field around any electrical device. A 100 amp electrical panel does have a magnetic field surrounding it but really no more than a refrigerator, microwave oven or any other electrical appliance. Will it harm you? That is debatable. Some say it will and some say it won't. I measure the electromagnetic field at my 100 amp service panel and at 5' there was no notable field. At 3' is where the filed becomes strong enough the be measured but even then it is only .7 miligause. At 1' it pegs my meter which only goes to 1 milliwatt. So if you are sitting at least 5' away from the panel you have nothing to worry about.
To be safe
The Governor and J-J- - 1969 File Safe 2-5 was released on: USA: 14 October 1970
it's not good