Electrical Service Certificates Kirk Caravan Service

electrical elv caravan service
electrical test and inspect service

 

Electrical Maintenance of LV/ELV Systems, Equipment & Circuits

 

COURSE CONTENT
Terminology
Review of low voltage (LV) system
ELV Sources of Supply
ELV Legislation
ELV Wiring
Circuits
Circuit tracing
Fault finding  


COURSE OBJECTIVES  
Understand electrical terms and their relationships
Alternating current
Direct current
LV and ELV
Voltage, current, resistance and power
Relationship calculations  

 
LV Systems 

Review the LV System:
Inlet
Consumer unit
Wiring type
Legislation  


ELV Sources of Supply

Understand battery technology:
Battery types
The leisure battery

Capacity and charging
Charing tests
Relative density
Battery safety and use
The battery compartment
Terminals 


Photovoltaic

Simple explanation of the technology
Battery charging
Installation


Generators:
Types 

Output
Regulation and speed control

Interests:
Simple explanation of the technology
Installation  

ELV Legislation Know of the relevant safety legislation:
EWR 1989 Competence for safe working
BS 7671:2008
BS EN 1648-1 Caravans
Scope and purpose
BS EN 1648-2 Motorhomes
Scope and purpose
The general provisions of EN 1648
Power supplies
Terms and definitions
Protective methods
Wiring
Overcurrent protection
Installation of fuses
Fuse sizes and relationship between voltage current and power
Prohibited locations
Selection and connection of appliances
Socket outlets and external lights
Users’ handbook  


ELV Wiring Understand the relative provisions for ELV wiring:

Fixed wiring
Cable type
Erection methods
Voltage drop and cable sizing
Calculations for voltage drop
Relationship between CSA, current and voltage drop
Motor movers  


Circuits Prepare circuit drawings


Circuit diagrams
Wiring diagrams
Circuit logic 


Circuit Tracing

Carry out circuit tracing:
Prepare circuit diagrams

Prepare wiring diagrams Use test instruments:

The multimeter
Tests to be carried out
How to test
Test results
Test simulations-  LV and ELV  


Fault Finding Understand how to fault find:

Fault types
Open circuit
Short circuit
Cross polarity
High resistance

Low resistance 
Data bus



 

Test and inspection

Know of the relevant safety legislation:
• Health and Safety at Work Act

• Electricity at Work Regulations

• BS 7671:2008 – Requirements for Electrical Installations

• Related British and European Standards

• Competence to carry out electrical work


Create and maintain a safe system of work:
• Isolation and locking off

• Proving dead

• Quarantining an area of work

• Safe use of hand tools

• Safe use of test instruments

• Safe work with electrical equipment


Know electrical terms and relationships:
• Static and current electricity

• AC and DC – relevant safety levels

• Voltage, current, power and resistance

• Electrical quantity and cable sizes


Understand protection against electric shock and burns:
• Electric shock

• Direct contact

• Indirect contact

•Arc flash

• Personal protective equipment


Determine circuit protection:
• Protection against overload

• Protection against fault

• Circuit breakers

•Operation

• Current rating

• Type

• No of poles

• Relationship between power and current rating

• Residual current devices (RCDs)

• Operation • Current rating

• Rated residual operating current

• Tests


Define earthing and bonding:
• Concept of earthing as applied to a touring caravan or motor home

• Concept of bonding as applied to a touring caravan or motor home

• What to earth and what to bond


Understand inspection and test of a touring caravan or motor home
• The inspection process

• Following the inspection checklist

• Labelling and identification

• Protection for the user of the installation

• The test process

• Test to be carried out

• How to test

• Test instruments and recording

• Practical tests on a simulated installation

• Practical inspection in a touring caravan or motor home

• Documentation

• Inspection reports

• Minor works certificates