Electrical Installation Technology  ·  Level 4
Trunking System Installation
Chapter 1: Identify trunking accessories
📚 5 Topics
⚑ What you will be able to do

By the end of this chapter, you will be able to:

  • Identify different types of trunking according to IEC standards.
  • Select the correct trunking sizes based on IEC standards.
  • Recognize various trunking accessories following IEC standards.

Mastering these skills ensures your installations are safe, professional, and compliant with industry standards, making you a valuable asset in the electrical trade.

Trunking system installation requires careful attention to safety to protect workers and maintain a hazard-free environment. This chapter focuses on identifying essential trunking accessories within a safe workplace context. Understanding workplace safety, adhering to workshop rules, and using appropriate personal protective equipment (PPE) are critical for success across all professional fields in Kenya, from hospitals and schools to banks and county government offices.

1.1 Workplace Safety

Workplace safety is paramount in any professional environment to prevent accidents, injuries, and equipment damage during trunking system installation. In Kenya, organizations such as county referral hospitals and universities emphasize strict safety protocols to protect staff and ensure smooth operations. Safety practices reduce downtime, enhance productivity, and comply with national occupational health and safety regulations.

1.1.1 Importance of Workplace Safety

Workplace safety involves creating an environment where risks are minimized and employees can perform tasks without harm. Safety is fundamental to sustaining operations in sectors like retail businesses and cooperative farms, where physical work is common.

Prevention of Accidents and Injuries

Effective safety measures reduce the likelihood of falls, cuts, electrical shocks, and other hazards common in trunking installation. For instance, a county government office reported a 40% reduction in workplace injuries after implementing safety training and hazard identification.

Compliance with Legal Requirements

Kenya’s Occupational Safety and Health Act (OSHA) mandates employers to provide safe working conditions. Adhering to these legal standards protects organizations like banks and SACCOs from penalties and reputational damage.

Enhancing Employee Morale and Productivity

Workers in safe environments, such as those in hotels and schools, tend to have higher morale and work efficiency because they feel valued and protected.

Minimizing Financial Losses

Accidents can lead to costly medical expenses, compensation claims, and equipment damage. For example, a retail business in Nairobi saved Ksh 500,000 annually by reducing workplace incidents through safety investments.

Promoting a Safety Culture

Encouraging all employees to prioritize safety fosters teamwork and responsibility. At a cooperative farm, safety committees actively involve workers in identifying and mitigating risks, improving overall safety awareness.

1.1.2 Basic Workshop Rules

Basic workshop rules establish the foundation for a safe and organized working environment during trunking system installation. These rules are essential in facilities such as universities and county hospitals where multiple activities occur simultaneously.

Maintain Cleanliness and Orderliness

A tidy workspace reduces tripping hazards and allows easy access to tools and materials. Nairobi’s largest university workshop enforces daily cleaning routines to prevent clutter-related accidents.

Use Tools and Equipment Properly

Incorrect use of tools increases the risk of injury and equipment failure. Staff at a county referral hospital receive training on correct handling of wire strippers, screwdrivers, and drills used in trunking installation.

Report Hazards Immediately

Prompt reporting of unsafe conditions prevents accidents. For example, SACCO office workers use a digital reporting system to alert supervisors about faulty electrical outlets or damaged ladder steps.

Avoid Unauthorized Access

Restricting access to workshop areas keeps untrained personnel away from dangerous zones. A hotel maintenance department uses signage and barriers to prevent entry during trunking works.

Follow Manufacturer Instructions

Adhering to equipment manuals ensures safe operation and prolongs tool life. At a retail business, staff are required to read and follow instructions before using power tools.

1.1.3 Types of PPEs

Personal protective equipment (PPE) is vital for safeguarding workers from hazards during trunking system installation. Various PPE types protect different parts of the body depending on the risks encountered in workplaces like banks, farms, and government offices.

Name Specification Use
Safety Helmet Hard shell with adjustable suspension Protects head from falling objects and impacts
Safety Gloves Insulated, cut-resistant, or rubber-coated Protects hands from cuts, abrasions, and electrical shocks
Safety Goggles Polycarbonate lenses with side shields Shields eyes from dust, debris, and sparks
Ear Protection Earplugs or earmuffs with noise reduction rating Protects ears from loud noises in workshops
Safety Boots Steel-toe cap, slip-resistant sole Protects feet from heavy objects and slipping

Safety Helmet

This is mandatory in any installation environment to prevent head injuries from falling tools or materials. At a county government office, helmets are worn at all times during trunking installation to comply with OSHA standards.

Safety Gloves

Gloves protect hands from sharp edges of metal trunking and electrical wires. Employees at a university maintenance department use insulated gloves to avoid electric shocks while handling live circuits.

Safety Goggles

Eye protection shields against flying particles generated when cutting trunking or drilling walls. A retail business experienced fewer eye injuries after enforcing mandatory goggle use during installation work.

Ear Protection

In noisy workshops, such as hotel maintenance rooms with power tools, ear protection prevents hearing loss caused by prolonged exposure to loud sounds.

Safety Boots

Appropriate footwear prevents foot injuries from heavy materials dropped accidentally. Farm workers installing trunking in irrigation control rooms wear steel-toe boots to avoid crush injuries.

Practice Questions

  1. Explain five reasons why workplace safety is critical in trunking system installation. (10 marks)
  2. Discuss five basic workshop rules that should be observed to maintain a safe working environment. (10 marks)
  3. Identify five types of PPE used in trunking installation and explain their specific protective functions. (10 marks)
  4. Describe how a county referral hospital could implement workplace safety measures during trunking installation. (10 marks)
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🔒1.2 Trunking types

Trunking systems provide essential pathways for electrical wiring and communication cables in various Kenyan workplaces, from hospitals to county government offices. Choosing the right type of trunking is critical for ensuring safety, durability, and ease of m…

🔒1.3 Trunking Sizes

Trunking sizes are a critical consideration in the installation of electrical and communication systems across various sectors in Kenya. Selecting the correct trunking size ensures adequate space for cables, facilitates maintenance, and promotes safety and aes…

🔒1.4 Trunking accessories

Trunking accessories are essential components that facilitate the installation, functionality, and maintenance of electrical trunking systems in various Kenyan workplaces. These accessories ensure that electrical distribution is safe, organized, and adaptable…

🔒1.8 Housekeeping (cleaning of the workplace after work)

Maintaining a clean and organized work environment is essential in any professional setting. In Kenya's diverse workplaces, such as county hospitals, universities, banks, and retail businesses, effective housekeeping promotes safety, enhances productivity, and…

Chapter Summary

This chapter emphasized the critical role of workplace safety by highlighting its importance, outlining basic workshop rules, and detailing the types of personal protective equipment required for safe practice. It then explored the different trunking types commonly used, including PVC, metallic, and galvanized iron options, each suited to specific installation needs. The discussion on trunking sizes covered standard measurements such as 16mm by 16mm up to 40mm by 25mm, clarifying their applications in various electrical setups. A comprehensive overview of trunking accessories followed, describing components like sockets, switches, lamp holders, joint boxes, pattress, circuit breakers, control and communication units, single-phase cut-outs, energy meters, earth rods, and switch fuses. The chapter concluded by stressing the importance of effective housekeeping, particularly the cleaning and organization of the workplace after completing installation tasks, to maintain safety and efficiency. This integrated approach ensures a thorough understanding of trunking system installation and accessory identification.

Self-Assessment

🔒 PDFDownload this self-assessment, with answers

A. Written Assessment

  1. What is the primary reason for observing workplace safety during trunking system installation? (2 marks)
  2. List three basic workshop rules that must be followed to ensure safety. (3 marks)
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Chapter Examination Questions

🔒 PDFDownload these examination questions, with worked answers

SECTION A (40 Marks) - Answer ALL Questions

  1. Explain why workplace safety is critical when installing trunking systems in a county hospital environment. (4 marks)
  2. Identify four basic workshop safety rules that technicians must observe during trunking installation. (4 marks)
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Chapter Practical Activities

Practical 1: Demonstrate correct use of PPE and adherence to workshop safety rules during trunking installation preparation

Electrical Installation Technology · Level 4
Trunking System Installation
PRACTICAL ASSESSMENT
TIME: 4 HOURS
⬇ PDFCandidate Instructions (Candidate Tool)

Type: Individual

INSTRUCTIONS TO CANDIDATE:
1.  You are required to perform the following task:
i.  Demonstrate correct use of PPE and adherence to workshop safety rules during the preparation for installing a trunking system 2000mm long.
2.  You have been provided with the following resources for the practical task:
Tools & EquipmentMaterials
Measuring tape 5mSafety boots
Spirit level 600mmDustcoat/overall
Marking pencilSafety goggles
Hand screwdriver setEar plugs
Insulated gloves
Hard hat
Workshop safety rules manual
⬇ PDFResources Required (Cutting List)
S/NItemQuantity
1Safety boots1 pair per Candidate
2Dustcoat/overall1 per Candidate
3Safety goggles1 pair per Candidate
4Ear plugs1 pair per Candidate
5Insulated gloves1 pair per Candidate
6Hard hat1 per Candidate
7Measuring tape 5m1 per Candidate
8Spirit level 600mm1 per Candidate
9Marking pencil1 per Candidate
10Hand screwdriver set1 set per Candidate
11Workshop safety rules manual1 per Candidate
⬇ PDFAssessor Guide
Items to be EvaluatedMarks AvailableMarks ObtainedComments
TASK 1: Demonstrate workplace safety and PPE usage
Wore all required PPE correctly (boots, dustcoat, goggles, ear plugs, gloves, hard hat)
(Award 1 mark each for correct use or 0)
6
Followed basic workshop safety rules (e.g., no running, no horseplay, correct tool handling)
(Award 1 mark each for 4 observed rules or 0)
4
Handled tools properly and safely
(Award 3 or 0)
3
Maintained clean and safe working area before and after task (housekeeping)
(Award 3 or 0)
3
Sub-Total16
PRODUCT CHECKLIST
Prepared trunking installation area safely with all PPE worn and safety rules observed
(Award 9 or 0 based on overall safety compliance and PPE use)
9
Demonstrated safe tool use and maintained tidy workspace
(Award 5 or 0)
5
Sub-Total14
GRAND TOTAL30
ASSESSMENT OUTCOME:   ☐ Competent    ☐ Not Yet Competent (competent if at least 50%)

Practical 2: Identify and Select Appropriate Trunking Types for an Installation

Electrical Installation Technology · Level 4
Trunking System Installation
PRACTICAL ASSESSMENT
TIME: 4 HOURS
⬇ PDFCandidate Instructions (Candidate Tool)

Type: Individual

INSTRUCTIONS TO CANDIDATE:
1.  You are required to perform the following task:
i.  Identify and select appropriate PVC, Metallic, and Galvanized Iron trunking types measuring 50mm x 50mm for a wiring installation.
2.  You have been provided with the following resources for the practical task:
Tools & EquipmentMaterials
Measuring Tape 5mPVC Trunking 50mm x 50mm
Marker PenMetallic Trunking 50mm x 50mm
Screwdriver SetGalvanized Iron Trunking 50mm x 50mm
Spirit Level 600mmTrunking Accessories (elbows, tees, covers)
Personal Protective Equipment (Safety boots, Gloves, Dustcoat)
⬇ PDFResources Required (Cutting List)
S/NItemQuantity
1PVC Trunking 50mm x 50mm2 meters per Candidate
2Metallic Trunking 50mm x 50mm2 meters per Candidate
3Galvanized Iron Trunking 50mm x 50mm2 meters per Candidate
4Trunking Accessories (elbows, tees, covers)1 set per Candidate
5Measuring Tape 5m1 per Candidate
6Marker Pen1 per Candidate
7Screwdriver Set1 per Candidate
8Spirit Level 600mm1 per Candidate
9Personal Protective Equipment (Safety boots, Gloves, Dustcoat)1 set per Candidate
⬇ PDFAssessor Guide
Items to be EvaluatedMarks AvailableMarks ObtainedComments
TASK 1: Identification and Selection of Trunking Types
Wore personal protective equipment (safety boots, gloves, dustcoat)
(Award 2 or 0)
2
Handled tools correctly and safely
(Award 2 or 0)
2
Measured trunking accurately within ±2mm
(Award 3 or 0)
3
Identified PVC trunking and its applications correctly
(Award 3 or 0)
3
Identified Metallic trunking and its applications correctly
(Award 3 or 0)
3
Identified Galvanized Iron trunking and its applications correctly
(Award 3 or 0)
3
Selected appropriate trunking type for a given installation scenario
(Award 4 or 0)
4
Demonstrated proper use of trunking accessories (elbows, tees, covers)
(Award 3 or 0)
3
Sub-Total23
PRODUCT CHECKLIST
Selected trunking types measurements match 50mm x 50mm specification
(Award 4 or 0)
4
Trunking types correctly matched to installation environment and use
(Award 5 or 0)
5
Trunking accessories correctly identified and selected
(Award 3 or 0)
3
Sub-Total12
GRAND TOTAL35
ASSESSMENT OUTCOME:   ☐ Competent    ☐ Not Yet Competent (competent if at least 50%)
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🔒Measure and Select Correct Trunking Sizes for Wiring InstallationPractical 3
🔒Installation of two 13A switched sockets on PVC trunking system 600mm apartPractical 4
🔒Installation of One-Gang One-Way Switch on Trunking SystemPractical 5
🔒Fit straight batten lamp holders onto a 1200mm trunking sectionPractical 6
🔒Assemble and Install Joint Boxes in a Trunking SystemPractical 7
🔒Installation of Two Deep PVC Pattress Boxes on Trunking SystemPractical 8
🔒Installation of Circuit Breakers in a 600mm x 100mm Trunking SystemPractical 9
🔒Installation of a Control and Command Unit (C.C.U) on a Trunking SystemPractical 10
🔒Installation of Single-Phase Cut-Outs in Trunking SystemPractical 11
🔒Installation of Single-Phase Energy Meter on Trunking SystemPractical 12
🔒Installation of Earth Rods for Electrical Grounding near Trunking SystemPractical 13
🔒Installation of Single-Phase Switch Fuse on Trunking SystemPractical 14
🔒Housekeeping after Trunking System Installation 1200mm x 100mmPractical 15
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Am I competent?

At the start of this chapter we promised you would be able to:

  • Identify different types of trunking according to IEC standards.
  • Select the correct trunking sizes based on IEC standards.
  • Recognize various trunking accessories following IEC standards.

Tick each one you can genuinely do.

So, are you there yet?

You're competent when you can confidently do 50% or more of what this chapter promised.

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