Its recent problems notwithstanding, California continues to light a path to the rest of the nation for policy change. In this case, the path would be lit with a device that uses considerably less power.
Communications systems and circuits in buildings must comply with the applicable rules in National Electrical Code (NEC) 2008 Article 800. Even though these systems operate at lower energy levels, improper grounding and bonding can result in severe consequences for equipment, property and people.
Underwriters Laboratories (UL) announced the publication of UL 2201, a Standard for Portable Engine-Generator Assemblies. Prior to this standard, there was no voluntary safety standard for portable generators sold in the United States.
Low voltage systems are often ungrounded, which is normal, but non-current-carrying metal parts of equipment associated with low voltage systems are generally required to be grounded if the supply system is grounded. This article reviews NEC requirements for grounding low voltage systems.
When installing recessed fixtures, carefully consider the location of the units. The presence of combustible materials surrounding the luminaire is very important, and recessed lights can act as chimneys for heat loss and moisture transfer into attic spaces.
Performance in the data center is affected by equipment not being grounded or bonded; therefore, the Telecommunications Industry Association (TIA) is working to expand its one and only existing grounding and bonding performance standard, ANSI-J-STD-607-A.
I recently did a workshop for a major city experiencing problems with inspections on photovoltaic (PV) systems during and after installation. The problem was between the inspection and fire department.