Hodder Education Construction 2024 Catalogue - Flipbook - Page 15
ELECTRICAL INSTALLATIONS
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✚ Services:
Includes the need for electricity/water supplies and drainage for the site
during construction work.
Other considerations for the cost of a project are company overheads. These
are the day-to-day costs of running an organisation and the office-based
support for the work, such as:
✚ office personnel and office costs
✚ vehicle maintenance, insurance and tax
✚ holiday pay, personal tax and National Insurance
✚ cost of issued equipment such as test instruments, conduit benders, etc.
✚ insurances, such as public liability and indemnity.
1 Planning and overseeing electrical work activities (Unit 301)
✚
Exam tip
Many of the considerations
may feature as part of
the synoptic assignment.
For example, you may be
required to create and
complete a take-off sheet.
LO2 Understand the
requirements for organising and
overseeing work programmes
Topic 2.1 Planning work programmes
When planning for the work on site:
✚ It is always best to plan the stages of the work using various work
programmes. This is to minimise wastage of labour and to ensure
specialist plant, machinery and all materials are on site when needed.
✚ Do a critical path analysis. This helps you to understand which tasks
depend on other tasks being completed. You can create a graphic
indication of labour and plant resources by drawing up a table of tasks.
✚ Once a critical path has identified the order of tasks, when equipment is
needed and what tasks may clash, labour resources can then be determined
from a bar chart or spreadsheet. When a bar chart is being completed,
careful consideration is given to the labour needed on any given day.
Critical path analysis
Looks at all the tasks that
are to be carried out and
places them in order. It can
also identify any problems
with labour requirements
and materials, as well as
any tasks that depend on
work by other trades or
organisations.
Worked example
The table shows fifteen tasks. The right-hand column indicates which tasks depend on others:
Task
Special equipment
Duration
Operatives
1
Install lighting cable basket
Cherry picker
2 days
2
Dependent on
-
2
Builders to chase walls and floors
1 day
N/A
-
3
Install floor trunking
2 days
2
-
4
Builders screed floor around trunking (no
other works allowed during period)
4 days
N/A
3
5
Install wall dado trunking
0.5 days
1
4
6
Install conduit drops in wall chases
0.5 days
1
2
7
Pull power cables into floor trunking
1 day
2
3
8
Fix distribution board (DB)
0.5 days
1
-
9
Terminate DB
0.5 days
1
7, 8 and 10
10
Pull in lighting cables ceiling basket/
conduit drops
1 day
2
1 and 6
11
Install luminaires
Cherry picker
1 day
1
10
12
Terminate all luminaires and switches
Cherry picker
0.5 days
1
11
13
Install and terminate wall sockets and
switches
0.5 days
1
5
14
Install and terminate floor socket-outlets
1 day
1
7
15
Initial verification
1 day
2
all
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My Revision Notes: City & Guilds Level 3 Advanced Technical Diploma in Electrical Installation (8202-30)
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