PAT Testing
sjg provides Pat Testing throughout Warwickshire - and beyond
Fast, Efficient Testing of 110v, 230v and IT equipment
Compatible with latest IEE Code of Practice
Fully CERTIFIED & DOCUMENTED testing of all 'portable' mains equipment
Regular Annual or ad-hoc testing
Out of hours testing at NO EXTRA CHARGE
What is PAT Testing?
Portable Appliance Testing (PAT) is an important part of a company's or
individual's Statutory responsibility to health and safety.
This is done using a series of specialized testing procedures on all
'portable' appliances where the items are inspected and tested with a
special 110v/240v testing device.
This ensures the equipment is in a safe condition for use.
The list of Portable Appliances is extensive. Typically, if the appliance
[110v & 240v] can be unplugged from its power source then it will need a PAT
Test.
What is Tested?
1. Plugs & Adapters are checked for compliance, damage and correct fitting.
2. Cables & leads are checked for wear and tear; heat damage; cuts and
abrasions
3. The appliance housing is checked for compliance and damage: cracks, dents
and corrosion .
4. An Earth bond test is conducted to ensure earthing of appliance meets
acceptable standards.
5. An Insulation test is conducted to ensure the insulation protecting the
conductors is valid
6. An Earth Leakage test measures leakage current to earth while the
appliance is operating
7. A Function & Load test ensures the appliance is operational within stated
parameters.
Each appliance that passes the inspection is labelled with an id number,
retest date and engineer's initials. A certificate with test values is
produced for each item and an inventory spreadsheet details all items.
SJG PAT Testing
ELI Testing
SJG provides ELI Testing throughout Warwickshire - and beyond
What is ELI Testing?
ELI testing means Earth Loop Impedance Testing. It is, basically, electrical
safety testing of 240v socket outlets.
The Tests
SJG makes accurate measurements of Wiring, Earth Loop Impedance and Phase Neutral
Impedance quickly and easily. The testing employs patented 'T Safe'
non-trip technology to avoid tripping in-circuit Residual Current Devices (RCDs).
The test is a comprehensive check of the wiring to obtain an Earth Loop
Impedance and Phase Neutral Impedance result displayed to 2 decimal places,
in accordance with the requirements of BS 7671 17th Edition.
The package of tests made on each outlet allows for a simple pass or fail scenario. Sockets passing are indicated by a simple pass sticker whilst failures are rendered unusable and a fault report is produced.
If the test detects a fault condition in the wiring under test, or the
supply voltage is less than 198V (<198V) or greater than 264V (>264V), or
the Earth
Loop Impedance is greater than 3000Ω(>3000Ω) or Phase Neutral Impedance is
greater than 3000Ω a failure will be recorded
TECHNICAL SPECIFICATION
Nominal Voltage Rating:220 - 240 V
Voltage Range for Wiring Error Detection:30 - 275 V
Open Loop indication: If Open PE or PN Loop is detected, no Impedance
Measurement takes place
Voltage Range for Impedance Measurement:198 - 264 V
Frequency:50 Hz
Loop Impedance Ranges:0- 8.99Ω, 9.0- 89.9Ω,90- 899Ω,900-1699Ω,1700-3000Ω
Phase Earth Loop Impedance Accuracy:
0 - 8.99Ω, � 4% � 0.05Ω*
9.0 - 89.9Ω, � 5% � 0.5Ω*
90 - 899Ω, � 5% � 5Ω*
900 - 1699Ω � 5% � 30Ω*
1700 - 3000Ωindicative
Phase Neutral Loop Impedance Accuracy:
.0 - 8.99Ω, � 4% � 0.05Ω*
9.0 - 89.9Ω, � 5% � 0.5Ω*
90 - 899Ω, � 5% � 5Ω*
900 - 1699Ω � 5% � 30Ω *
1700 - 3000Ωindicative
Voltage Accuracy: � 4 %
Frequency Accuracy: � 4 %
Temperature Range: -10� to 40� C at max
80 % Relative Humidity
(Non-Condensing)
Power consumption: < 1.6 W
Overvoltage category: Cat III/ 300V
RCD in the Circuit Under Test
The test should not trip RCD's during the testing of wiring with in-circuit
RCD's.
Note, however, that many modern products have a constant low level of earth
leakage, to ensure that noise and stored charge is dissipated, for example,
3mA earth leakage is typical for a desk-top computer.
Note, also, that a 30mA RCD is guaranteed to trip at 30mA earth leakage,
should not trip at 15mA, but is very likely to trip with earth leakage
currents above 22mA.
Possible Measurement Errors of Earth Loop Impedance
Where supply circuits under test have highly inductive or capacitive
components
distributed on that circuit (such as mains filters), or there is an
excessive amount
of mains disturbance present (e.g. motors running, rain shorting exposed
wires,
or a generator with high inductance supplying power, etc), it is possible
the
Phase Neutral and Earth Loop Impedance measurement could be adversely
affected.
The report PN CIRCUIT NOISE is used to indicate noise on the Phase
Neutral wires. The report PE CIRCUIT NOISE is used to indicate noise
on the Phase Earth wires. If the noise levels on Phase Earth are not
adversely too high, an estimated Phase Earth Impedance measurement is used
together with a circuit noise warning.
Value added services available from SJG:
Network Infrastructure: Supply, installation & maintenance of voice & data
networks; cat 5, 6 fibre. Telephone systems: Supply, installation & maintenance of telephone systems
inc. VoIP Specialised testing Datacomms: Fibre, ISDN [PRI, DASS , DPNSS & BRI] Specialised testing Electrical: PAT, ELI, Distribution CCTV: Supply, installation & maintenance of CCTV
Door Entry & Access Systems: Supply, installation & maintenance of
multiple integrated access control systems Nurse Call Systems: Supply, installation & maintenance of
systems for healthcare sectorsAreas Covered
Banbury, Gaydon, Leamington Spa, Rugby, Southam, Warwick
