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Guide to Welder Safety


How should you secure a welding machine?

How should you secure a welding machine?

Unfortunately, there is no quick answer to this question, as it always depends on the conditions under which welding is to be carried out. First and foremost, the protection of a welding machine depends on the machine itself.

Decision guidance for the selection of the welding equipment can be

    the material to be processed the available electrical power financial means the locations where welding is to take place (easily accessible or in confined spaces) the expected frequency of use

All these questions must be answered in order to determine the welding equipment and ultimately its protection.

Can a welding machine be operated from a normal power outlet?

In principle, yes. However, it is important to note that the socket to be used must have a fuse protection of at least 16A and that the welding equipment is designed for operation with 230V. Otherwise, the fuse will fall as soon as the machine is switched on, as this is where the current consumption is greatest.


Is there a difference when operating on a 400V network?

Yes, there is. When a welding machine is operated from a normal socket, it usually runs on “low flame”. At a three-phase power socket (also called CEE socket or power current) a much higher power is usually provided. The device can fully develop its possibilities here.

The probability of fuse tripping is also reduced, since the fuses are not fully utilized.

Do I need a ground fault circuit interrupter to protect a welding machine?

How should you secure a welding machine?

The RCD is a regulation of the VDE. It is to be used for all sockets with a fuse protection not higher than 20A. In outdoor use this number increases to 32A for all portable devices. If the welding equipment falls into one of the mentioned categories, an RCD must be used. In case of doubt, a qualified electrician should be consulted.

What to do if the protection is too low?

In this case, a visit to the specialist is mandatory. It is possible to increase the load capacity by replacing the fuse and the cable connected to it. However, this work must always be carried out and documented by a qualified electrician. Otherwise, there is a risk that the insurance company will not pay for the damage in the event of a claim.

Alternatively, in individual cases, a smaller welding machine could make do with the fuse, provided that it is still suitable for the task.


The question of how to secure a welding machine depends on too many factors to be able to make a general statement here. It is and remains an individual case decision. The fact is, however, that the large electrical power required by the equipment also poses a great danger. This should be handled with respect in any case.


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