Leadership

SAFE GROUNDING FOR FIRE AND POLICE SIGNAL BOXES

Issue 22 and Volume 56.

SAFE GROUNDING FOR FIRE AND POLICE SIGNAL BOXES The writer has, for many years, been very much interested in the discussions before this Association on grounding the outside shells of fire and police signal boxes. Last year the Association was nearly ready to recommend the grounding of both the inside and outside shells of both police and fire boxes. This would have surely caused a burn-out in case of crossed wires, and would not have made the boxes safe to any person touching the hook in a fire box or a selective pointer, telephone hook or pull lever of a police box, while circuits of same were crossed with high tension wires. The argument of those who advanced this proposition was that they preferred to introduce the extra hazard to the mechanism of the boxes and risk burning them up, rather than have anyone receive a fatal shock. Among the…

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