The City and Guilds 2395 Practical Exam
The City and Guilds 2395 exam consists of two parts:
- Visual inspection
- Periodic Inspection and Testing with the completion of the Electrical Installation Condition Report
C&G 2395 Visual Inspection
On the day of the C&G 2395 practical exam the first task for delegates to complete is a visual inspection of a model electrical installation. The installation consists of only a few demo circuits and of a single phase consumer unit.
Within 30 minutes the delegate will be required to visually identify 12 faults/non compliments with BS 7671.
The faults can be some of these, but the list is far from complete:
- Incorrect polarity
- Exposed live parts
- Wrong choice of circuit breakers
- Wrong circuit arrangements inside the consumer unit (Neutrals and Earths not in order in their respective terminal bars)
- Wrong choice of colour coding
- Missing earth
- Twisted cables
- Missing protective bonding conductor
- Missing danger notices or other warning notices
- Incorrect or missing labelling of protective devices, switches and terminals
- Wrong selection of conductors for current-carrying capacity
- Connection of conductors (exposed copper)
- Physical damage to accessories
- Missing earth sleeving
- Loose SWA cleats
- Missing identification of switch wires
Remember this is a visual inspection only! You are expected to find faults without the use of hands or other methods.
C&G 2395 Periodic Inspection & Testing
In the final part of the C&G 2395 practical assessment the delegate will be required to perform a full Inspection & Testing procedure on a sample electrical installation. The term "full" indicates that the inspection must cover 100% of the electrical installation. Sampling is allowed in "real life" conditions, but not on the C&G 2395 exam.
The given time is 120 minutes for this task.
The delegate will be presented with a sample electrical installation consisting of:
- 3 Phase & Neutral board supplying:
- 3 phase motor supply in SWA cable (DOL starter, no motor connected)
- Sockets supplied by a ring circuit
- Radial circuit to a FCU with MI cable
- Sub-main supply to the single phase consumer unit
- Single Phase & Neutral consumer unit supplying:
- Lighting circuit with intermediate switching
- Lighting circuit with a dimmer switch
- Socket outlet supplied by a radial circuit.
Before anything else the delegate will be expected to perform a Safe Isolation Procedure.
The sequence of the inspection and testing is as follows:
- Assessment of general characteristics
- Continuity of protective conductors, including p rotective bonding
- Continuity of ring final circuit conductors
- Polarity dead tests
- Insulation resistance test
- Polarity live tests
- Earth fault loop impedance tests
- Prospective fault current test
- Phase sequence test
- RCD test
- Functional testing
The delegate will be expected to perform a 100% correct inspection and testing procedure in the correct sequence.
It is very important to remember that as part of the C&G 2395 practical assessment the extent of the installation to be inspected is 100%! The delegate will be expected to inspect the installation during the testing process for faults and signs of damage within the installation. To do a thorough inspection the delegate will be expected to remove all lids and covers so as to gain visual access to parts of the electrical installation.
Individual items to be inspected:
- Joints and connection
- Flexible cables and cords
- Accessories and switchgear
- Thermal effects
- Basic and fault protection
- Protective devices
- Enclosures and mechanical protection
- Marking and labelling
Any faults or damages found must be reported to the examiner and recorded on the Electrica Installation Condition Report.
On our next pages we will cover each of the tests in full detail.