If the glass in an Edison fuse is clear but the body is damaged, what is indicated?

When examining a damaged Edison fuse where the glass is clear but the body is compromised, the condition suggests that the fuse has experienced an overload. A functioning fuse will typically have a glass body that is intact and clear, indicating that it has not blown due to an electrical fault. However, if the body of the fuse is damaged, it implies that the fuse experienced conditions exceeding its rated capacity, which could lead to melting, charring, or physical breakage.

In scenarios of overcurrent or overload, distinguishing factors such as a clear glass body might indicate that the filament within has not melted completely, but the physical damage signifies that it has been subjected to excessive heat or stress. Thus, the clear appearance of the glass is not sufficient to conclude normal functionality, especially when physical integrity is compromised.

Understanding the context of these damages helps in assessing the condition of electrical systems and the necessity for replacements or further investigation into potential electrical problems that caused the overload.