Hi,
First time poster here.
Regulation 443.4.1 requires protection against overvoltages in three specific cases, one of which is to protect from failure of a "safety service".
The definition of Safety service is described in Table 2, with some examples listed in Chapter 56.
The definition in table 2 states "an electrical system... to protect or warn persons in the event of a hazard"
As an installer/integrator of life safety, security, and communications systems, my concern is... What other systems could reasonably be expected to fall under this definition?
- Emergency call systems (used by vulnerable persons to call for assistance)
- Panic alarm systems (used in the event of a personal attack)
- Intruder hold up and alarm systems (used to warn of break in or attack)
- Access control systems (can be used as lockdown systems to protect against terrorist or criminal attack)
- Telephony (can be used to warn persons of an emergency event)
- Signalling device (used to signal an event to an Alarm Receiving Centre)
Also, with the increasing adoption of system convergence, the above systems can sit on, and communicate over, an IP data network. If the data network is an integral part of the above systems, would that also fall under the definition??
Cheers, Simon.