Safety in Electrical Design

Dates to be advised. Please contact Barbara Steel on for further information.


It is recognised that no product can be absolutely safe. At the same time the laws for product liability ensures that people who suffer damage from a design defect can win compensation without having to prove negligence. Manufacturers, managers, suppliers, users and even individual designers can all be held liable. Therefore there must be a design strategy based on competence which will, as far as reasonably possible, avoid an error or failure in information which will lead to a defect.


This course will identify the essential considerations and techniques for safety in designs and set them in context with examples from real cases. With this information you will be able to take competent decisions and measures to protect your company, yourself and the users of your products within the real restraints of time, cost and available technology.



Managers, designers, consultants, project engineers, manufacturers, safety, test and maintenance engineers.


Course Programme

During each session there will be:

i) A presentation of the essential elements of the relevant papers.
ii)  A practical example (where relevant) and questions to the course members to test understanding on the subject presented
iii) General questions and discussions

The presentations will have scope to follow up in more detail any points arising that are of particular interest.

Course Materials
Papers on each subject
Appendices including:-


09:00 A Brief on the Law
The selling imperative
Market advantage
Designing for Safety 1
Technical principles
The Common thread
Scope of safety
10:30 Coffee Coffee
11:00 Safety in Designs
What hazards?
What are standards?
Choosing and using standards
Designing for Safety 2
Technical details
Essential requirements
12:30 Lunch Lunch
14:00 Risk Control
The safety case
Hazard and Risk assessment techniques
Designing for Safety 3
More details
Advanced techniques
15:30 Tea Tea
16:00 EMC and Safety
Real compatibility
Safety related effects
Designing for Safety 4
Abnormal operation and misuse
Instructions and marking
Product defects and information


"Safety in Electrical Design" can also be run as an in-house course (minimum 8 delegates), with emphasis given to your specific project needs. Please enquire for further details.




Session 1
Commercial advantages; Trade without barriers; Market access; Risk reduction; Transfer of Risk; Retained Risk; Information; Warnings and Instructions; Marks and Marking; Company Procedures; Policy statements; Audits

Session 2
Safety Principles; Order of application; HSE Five Step Approach; Examples of Application; Hazard Log; Hazard and Risk Classification; Conformance Assessment; Verification and Corrections; The Safety Case; Construction and Presentation; Hazard Identification and Risk Assessment Techniques; Standards; References; Applications; Management procedures and controls; Safety specification; Assignment of Responsibilities; Review stages; Reports and declarations; Product release

Sessions 3 and 4
EMC and Safety; Sources and Propagation; Control of interaction; Particular hazards from EM sources; Radio spectrum; IT and control equipment; Non-Ionising radiation hazards to health; Electrical equipment; Essential characteristics for safe use; EMC related essential requirement in Directives and Regulations; Machinery; Essential Characteristics for safe use


Session 1
Technical Principles; Introduction and Ideas; The scope of Electrical Safety Standards; Electric Shock; Energy; Mechanical Hazards; Excessive heat; Radiation; Chemical hazards; Design control; Records; Documentation and Marking; Warnings; Instructions; Information; Language and symbols

Session 2
Technical Details; Advanced techniques; Equipment classification; Features of classifications; Factors in choices; Suitability for environment; Principle of double improbability; Application to different hazards; Insulation; Insulation as a system; Suitability convenience and cost; Bridging insulation; Essential elements; Safe impedance; Creepage distances and clearances; Factors affecting dimensions; Concessions for reducing dimensions; Measurement rules; Higher voltages; Small dimensions and voltages; Resistance to dust, humidity and moisture; Protections degrees; IP Classification and testing; Acceptable combinations of protection degrees; Protection against electric shock; Enclosures; Out of reach; Limitations of current and energy; Limitation to safe voltages.

Session 3
Earthing; Protective earthing; Functional earthing; Reliability; Suitability; Testing connections; Supply connections; Terminals and terminations; Wiring; External Wiring to Equipment; Equipment internal wiring; Key points to watch; Components; Relays; Transformers; Fuses; Inlet connectors; Filters; Power supply transformers; Materials; Construction; Heating; Insulation

Session 4
Materials and Fire Enclosures; General; Material ratings and classification; fire enclosure concepts; Domestic equipment; Commercial and industrial equipment; Limited power circuits; fire enclosure construction; Hazards; Mechanical Hazards; Protection against functional hazards; Protection against radiation hazards; Protection against chemical hazards; Equipment considerations; Protection philosophy; Abnormal operation and fault conditions; Heating; Endurance testing; Measurements; Working to the limits; Marking; Marking for use; Marks of approval; CE marking; Instructions and information; Legal requirements; Language; User instructions; Explanation of symbols and warning marks; Maintenance and disposal information.


The Safety in Electrical Design Course is listed under the IEE's Continuing Professional Development Scheme. From January 1999 the CPD Points System will be discontinued and replaced by a "level of competency" scale. We are awaiting the IEE's advice on how this scale is assessed and will update this web page once we have the information. Please bring your IEE record card with you when attending the course for updating.


Price per person which includes coffee, lunch, tea and printed course notes:

We are currently running this on a bespoke course basis only.

Enquiries should be addressed to: Barbara Steel Tel: 01483-686040 Fax: 01483-686041 or send an email by clicking below:

Short Courses Enquiry

To reserve a place on the above course please complete this Registration Form
A refund of fees (less a 25% administration charge) can only be made for cancellations received in writing ten working days prior to the event. Cancellations after this date will be charged at the full rate although substitutions can be made at any time prior to the event. The University reserves the right to cancel any course on the grounds of insufficient numbers or for other reasons beyond our control.

Registrations cannot be accepted without a valid Purchase Order, Cheque or Credit Card booking.



Barbara Steel: July 2005