Extra-low voltage is an electricity supply voltage in a range which carries a low risk of dangerous electrical shock. The International Electro technical Commission member organizations and the UK IET (BS 7671:2008) define an ELV device or circuit as one in which the electrical potential between conductor or electrical conductor and earth (ground) does not exceed 50 V a.c. or 120 V d.c. (ripple free). EU’s Low Voltage Directive applies from 50 V a.c. or 75 V d.c.
ELV System for Buildings stands for Mechanical and Electrical (M&E) System deployed in residential and commercial buildings :-
1-Data transmission IT Networks; Local Area Networks(LAN) using Fiber Optic, Copper or Wireless(WIFI).
2-Telephone (PABX) :Voice & Video.
3-CCTV/ IP Surveillance.
4-Fire Alarm System ( Addressable & Conventional System).
5-MATV/SMATV/ IPTV.
6-Sensors Systems.
7-Vehicle Access Control & parking Management Systems.
8-Door/lock Access Control & Security control systems.
9-Lift Access Control systems.
10-Lighting Control Systems(LCS), Home Automation, BAS, Dimming Systems, GRMS,BMS.
11-Public Address Broadcasting.
12-Tour Guard Patrol.
13-Audio Visual (Auditorium/ Conference Halls),BGM.
14- HVAC & BMS systems.
15-UPS.
16-Trunk Radio System.
17-Fence Intrusion Detection System – FIDS.
18-Master Clock System – MCS.
19-Sound, Paging & Intercom Systems.
20-Nurse Call Systems.
21-Mass Notification Systems.
22-BI-Directional Amplifier Systems.
23-White Noise(SOUND MASKING) Systems.
24-Distributed Antenna or DAS System.
25-Sound Masking Systems.
26-Burglary Alarm Systems.
27-Professional Pressure Washing Services.
28-Office Management Systems.
29-Water Management Systems.
30- Property Management Systems(PMS).
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