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City and Guilds 2365 Part 1

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james sheehan

on 13 December 2012

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Transcript of City and Guilds 2365 Part 1

Application of Health and Safety and Electrical principles City and Guilds 2365Diploma in Electrical InstallationLevel 2 Unit 201 Outcome 2
Apply safe working practices and follow accident and emergency procedures Session 1
Working in confined spaces Working In A Confined Area There are times when people working in the electrotechnical
sector have to work in less than ideal conditions. Working In Areas Of Increased Risk Risk areas could include;
Working in ventilation ducts.
Working in pits in a garage or spray area
Working in a small room with little room for manoeuvre.
Working at heights.
Working in trenches.
Working in areas where chemical substances are present.
Working where there is a risk of fire.
Working where there is poor ventilation Working In A Confined Area Some of the problems that come from working in a confined area;
Unable to move away quickly.
Often surrounded by metalwork (this is called a restrictive. conductive location) Poor ventilation. How To Work Safely Can the work be done without going into the confined space?
Identify the necessary work as well as the hazard.
Can the work be altered or the space changed to make the work safe?
Ensure that training has taken place to ensure workers know and can manage the risks.
Access and egress should be manageable with a hole large enough for the worker and any protective equipment.
If the space needs ventilation make sure it is done before entry.
Test for air quality and toxicity.
Avoid disturbing slurry to avoid the release of gas.
Wear breathing apparatus when necessary.
Avoid the use of additional oxygen as this increases the risk of explosion.
Where necessary wear a rescue harness with life lines attached to somewhere outside the space.
Have someone to keep watch. Restrictive movement Surrounded by metalwork
There may be times when work has to take place in an area where it is impossible to get away from metalwork. If the metalwork becomes live then you become live.
BS 7671 calls this type of installation a conductive location with restricted movement and we then need to look at Section 706 of BS 7671.
In Section 706 additional precautions relate to voltage levels and protection against direct and indirect contact.
Poor ventilation
In an enclosed space people can have problems with the space that they have to work in.
When the space is very small the flow of air can be limited and within a short period of time can become stale and breathing becomes difficult. Safe Working In all of the hazardous working situations you must never work alone.
It is essential that you never place yourself in a situation where there is no back up if anything goes wrong Working in trenches (The Management of Health and Safety at Work Regulations 1999, regulation 3).
For work in confined spaces this means identifying the hazards present, assessing the risks and determining what precautions to take. In most cases the assessment will include consideration of:
the task;
the working environment;
working materials and tools;
the suitability of those carrying out the task;
arrangements for emergency rescue. Working at heights The Regulations require duty holders to ensure:
all work at height is properly planned and organised;
all work at height takes account of weather conditions that could endanger health and safety;
those involved in work at height are trained and competent;
the place where work at height is done is safe;
equipment for work at height is appropriately inspected;
the risks from fragile surfaces are properly controlled; and
the risks from falling objects are properly controlled. Working at heights First ask yourself; am I fit to work at height?
Then think about the condition and the position of the ladder.
A leaning ladder in good condition has:
Both feet firmly attached and with a good tread
Clean rungs
Undamaged stiles (the side pieces that the rungs are attached to)
Secure fastenings when it is extended
A leaning ladder in a good position:
Is at an angle of 75° - one unit out for every four units up,
Will not move at the bottom
Stands on a surface that is:
firm
level, see
clear
dry
not slippery
Will not move at the top,
Rests on a strong upper resting point (not plastic guttering or a window)
Has horizontal rungs (use a spirit level Working close to unguarded machinery PUWER requires that equipment provided for use at work is:
Suitable for the intended use
Safe for use, maintained in a safe condition and, in certain circumstances, inspected to ensure this remains the case
Used only by people who have received adequate information, instruction and training
Accompanied by suitable safety measures. Working where a fire risk exists Fire risks can be avoided by the careful planning and control of all work activities, but good housekeeping will only help to reduce the risks. Toxic or corrosive substances Working where toxic or corrosive substances exist;
Hazardous substances exist in a variety of forms both on a construction site and within the manufacturing sector.
Acid for batteries,
hydrogen given off by batteries when charging,
fumes in tanks etc
In all circumstances however the control process remains the same:
identify the hazard
assess the risk
control the risk
train the staff
monitor Aims and objectives
describe the risks associated with working in enclosed spaces
explain the problems associated with working alone. Two of these conditions might be
1)Working in confined spaces
2)Working in areas of increased risk When we consider the need for safe working within a hazardous environment we need to;
wear the appropriate clothes (PPE)
breathing apparatus
follow the safe system of work
use the permit to work scheme. Taken From HSE
Safe work in confined places When working underground risks still exist.
If we are working in a trench and it is not shuttered properly then the sides can, and do collapse leading to death from being crushed or by not being able to breathe. Taken From HSE
Working from heights Taken From HSE
Working from heights Machinery should have guards that are interlocked with the supply.
There are no times when it is appropriate work on machinery under normal operating conditions without appropriate guards and training.
However, there may be times when you need to maintain the machinery while it is live. To prevent fires:
use materials that are not easy to ignite
keep flammable materials on site to a minimum
carry flammable materials in suitable containers
If work is necessary then:
no smoking
no sparks – watch batteries, calculator batteries, mobile phones
no hot work – soldering etc.
containers that previously contained flammable substances are purged.
avoid gas leaks
store materials safely
have correct extinguishers present
check plant at regular intervals
clear rubbish away at regular intervals. Permit to Work This is part of the safe system of work.
It lays down a set organised procedures for doing a task.
A permit to work is an actual piece of paper given to a person competent to do a specific task. The basic points covered in the permit to work scheme are;
The issuer of the permit must be satisfied that the equipment is safe.
The issuer of the permit must be satisfied that the person to who the permit is given is competent to receive it.
The information in the permit is precise and accurate.
The time the permit comes into effect.
The issuer must also cancel the permit after the task has been completed.
The person who holds the permit is responsible to make sure that it is followed absolutely. Isolation You will have realised that with this amount of danger it is essential that a good means of isolation is used .
It is equally important that in the process of finding out whether a circuit is live or not, no mistakes are made.
Safe procedures need to be observed not only when working with equipment but also when testing. Safe Isolation Procedure For testing a potentially live source two pieces of equipment are required
Approved voltage tester
Voltae proving unit
GS 38 provides a set of values that should be followed for test leads. 3 End of session 1
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