Hidden electrical equipment in buildings usually accounts for approximately 10 percent of the building value. Air conditioning and refrigeration equipment presents its own special set of circumstances. A florist or butcher can experience expensive spoilage losses. New environmental standards now require conversion to CFC-free equipment, in many cases. Mechanical breakdown of equipment can require temporary rental of replacement equipment, not to mention the potential loss of clientele.
Communication systems present a particularly susceptible exposure to electrical hazards.
These systems are extremely sensitive to electrical fluctuations. New phone systems compare greatly to actual computer systems and are easily damaged by power surges and electrical arcing. Most businesses cannot operate without sophisticated telephone systems. These systems can cost many thousands of dollars and can, in some cases, be very difficult to replace. Communication systems today have taken on a new appearance to include PBX phone systems, fax machines, voice mail, and computer-assisted systems.