1).
Passive infra-red detectors
Passive infra-red (PIR) detector units allow householder switch on
lighting units automatically whenever the area covered approached by
a moving body whose thermal radiation differs from the background.
‘Bad men all hate the light and avoid it, for fear their practices should be
shown up’ (John 3:20).51). nearby motorway
junction can, however, greatly increase the risk factor.Electrical installations and wiring systems
335
Fire alarm circuits are Band circuits and consequently cables forming
part fire alarm installation must physically segregated from all Band
II circuits unless they are insulated for the highest voltage (IEE Regulations
528.
Definition
Security lighting the first line of
defence the fight against crime. 14. Police forces agree that homes and public
buildings which are externally well illuminated are much less attractive
target for the thief.
Intruder alarms
The installation security alarm systems the United Kingdom already
a multi-million-pound business and yet also relatively new industry. This
type detector ideal for driveways dark areas around the protected
FIGURE 14. recent study carried out Middlesex University
has shown that two London boroughs the crime figures were reduced
by improving the lighting levels. Most intruders are young, and foolhardy opportunists. These detectors sense the presence person outside
the protected property and additional lighting switched on.1 and 560. They ide-
ally want get and away quickly but, they can work unseen, they may
take lot trouble gain access property by, for example, removing
the glass from window.
Not all homes are equally risk, but all homes have something value to
a thief. Flats and maison-
ettes are the most vulnerable, with other types property roughly equal
risk. Taking the simplest
precautions will reduce the risk, while installing security system can
greatly reduce the risk successful burglary.
As society becomes increasingly aware crime prevention, evident
that the market for security systems will expand.
Most intruders are looking for portable and easily saleable items such as
video recorders, television sets, home computers, jewellery, cameras,
silverware, money, cheque books credit cards. Properties cities are highest risk, followed homes towns
and villages, and least risk are homes rural areas.
.
Security lighting installed the outside the home may activated by
external detectors.7. The Home Office has
stated that only homes are sufficiently protected against intruders,
although 75% householders believe they are secure.51
Security lighting reduces crime. This will
deter most potential intruders while also acting courtesy lighting for vis-
itors (Fig.
Security lighting
Security lighting the first line defence the fight against crime
