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Police vehicle upfit checklist: the parts list ...

A planning checklist for a police vehicle upfit: controller, siren and bar compatibility, power distribution, wiring, push bumper, brackets and cameras, plus the safety limits set by the vehicle maker.

Ambulance warning light zones explained: NFPA 1...

How ambulance warning lighting is specified by zone, what NFPA 1900, GSA KKK-A-1822F and CAAS GVS v4.0 each cover, and how to turn an agency specification into a lighthead layout.

How to choose an emergency light bar: roof fit,...

A buyer's guide to emergency vehicle light bars: full-size vs mini, SAE class and color, serial vs hardwired control, mounting and current draw, with Federal Signal and Whelen examples.

IP ratings explained for emergency vehicle ligh...

How to read an IEC 60529 IP code, the difference between IPX6, IPX7, IPX8, IPX9 and IP69K, how NEMA types compare, and what we specify for each location on a...

SAE J595 and J845 warning-light classes: what C...

What SAE J595, J845 and J578 cover, what Class 1, 2 and 3 actually mean, how NFPA 1900, KKK-A-1822F and California Title 13 use them, and what to look for...