Seaward 100 PrimeTest - Manual (Page 18)

PrimeTest 100 Operating Instructions
16
3.5 Testing an extension lead
• Visually inspect the mains cord and plug for
signs of damage.
• Check that the correct fuse is fi tted.
• If the cord passes a visual inspection proceed
with the electrical tests.
• Plug the supplied 0.5m red IEC lead into the
IEC socket and into a mains outlet on the
extension lead. Plug the mains plug of the
extension lead into the front panel mains socket
. on the PrimeTest 100.
• The extension lead can now be tested in the
same manner as an IEC as described above.
Note: The protective earth resistance will
depend upon the length of the extension
lead and the size (cross sectional area)
of the cable. The measured value maybe
be acceptable even if a cross is shown
next to the R
PE
enunciator.
Table 1: Approximate resistance of protective
earth conductors.
For further information on protective conductor
resistance and testing of portable appliances can
be found in the Code of Practise for In-service
Inspection and Testing of Electrical Equipment
published by the IEE.
7
1
Cord size / current rating
0.5mm 2 /(3A)
0.20
0.40
1.00
Length
5m
10m
25m
1.0mm 2 /(10A)
0.10
0.20
0.50
1.25mm 2 /(13A)
0.10
0.20
0.40