Electronic equipment must meet strict shielding standards to prevent electrical noise from entering or leaving the equipment.
The NEC and NFPA 72 have an interwoven relationship that is paramount to the proper operation of fire alarm systems.
The results of the ground-fault current tests conducted at 40, 50, and 100 amps showed minimal temperature rises on the cable armor and fittings.
The 2002 National Electrical Code brings changes to the industry.
Work on the 2002 National Electrical Code has been completed. Those using the NEC will find a significant difference in the new edition.
David Young discusses many of the changes that became effective in the 2002 National Electrical Safety Code (NESC)
Similar to GFCIs, UL 1699, the Standard for Arc-Fault Circuit Interrupters does require monthly testing.
What should be the extent of involvement of an electrical regulator in the inspections of electrically connected life safety and fire protection systems?
Smoke detectors are designed and installed to provide reliable early warning smoke detection systems for the protection of life and property.