Fusable links have what diameter actuating cable?

Fusable links have what diameter actuating cable?

• A. 1/8"
• B. 3/16"
• C. 1/32"
• D. 1/16"

Answer: (D)

Fusable links are heat-activated devices that, when exposed to fire, melt a fusible element and release a mechanical linkage to actuate safety equipment such as a fire shutoff valve. The actuating cable must fit the valve linkage and have enough strength to pull the mechanism reliably once the link has melted. The standard size used for these assemblies is 1/16 inch, which provides a dependable pull without being so large that it won’t fit the hardware. Larger diameters would be impractical for the compact valve assemblies, while smaller ones might not deliver sufficient force to actuate the valve before the fuse melts.

Fusable links are heat-activated devices that, when exposed to fire, melt a fusible element and release a mechanical linkage to actuate safety equipment such as a fire shutoff valve. The actuating cable must fit the valve linkage and have enough strength to pull the mechanism reliably once the link has melted. The standard size used for these assemblies is 1/16 inch, which provides a dependable pull without being so large that it won’t fit the hardware. Larger diameters would be impractical for the compact valve assemblies, while smaller ones might not deliver sufficient force to actuate the valve before the fuse melts.