Ans. It is constructed as shown in fig. 2,239, the fuse wire being visible and stretching between the two metal portions of the plug.
Ques. What is a cut out fuse?
Ans. One similar to a simple fuse, but provided with clip contacts as used for knife switch contacts.
The fuse wire is usually contained in a china or porcelain tube, which also serves the purpose of a handle for withdrawing the fuse.
Ques. What is an expulsion fuse?
Ans. One in which the fuse is placed in an enclosed chamber with a vent hole.
In operation, when the fuse blows, the hot air and molten metal are expelled through the vent.
Ques. What is a no arc fuse?
Ans. A cartridge type fuse, in which the space surrounding the fuse wire is filled with powdered material.