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Surge Protection to BS7671 Unit 9: BS 7671 Regulations on Surge Protection - Part E

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Unit overview

Part 5 of BS 7671 is all about the requirements of Selection and Erection of equipment, the aim of this unit is to introduce to you the relevant regulations in Part 5 as appied to surge protection in terms of specific SPD characteristics and method of connection of SPDs.  

Please note, It is recommended that you have studied Unit 5: BS 7671 Regulations on Surge Protection - Part 1, Unit 6: BS 7671 Regulations on Surge Protection - Part 2, Unit 7: BS 7671 Regulations on Surge Protection - Part 3 and Unit 8: BS 7671 Regulations on Surge Protection - Part 4 to fully appreciate this Unit.

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Further Information
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Level Technical
Partner Details

Mr Robin Earl, Market Development Manager, DEHN (UK) Ltd. 

Robin has over twenty years’ experience of the field surge protection, originally trained by DEHN and SOHNE prior to the establishment of the DEHN UK Office. He is currently serving in BS7671 JPEL64 subcommittee D on Surge Protection and Foundation Earthing. He has presented many CPD seminars on Surge Protection and Lightning protection to IET and CIBSE members.


Dr Tony Sung, Director, Energy Reduction Management Ltd

Tony is an independent Chartered Energy and Electrical Engineering Consultant. Tony was the course tutor for the MEng(Hons) degree course in Architectural Science and Engineering Services at Manchester University. He has given lectures in Lightning and Surge Protection to BEng(Hons), MEng(Hons) and MSc students in UK and Overseas universities. He is currently the Chairman of CIBSE Electrical Services Group and representing CIBSE on BS7671 the main JPEL64 committee. He is also External Examiner to the University of Northampton.

Type Unit
What you will learn
At the end of this unit, you will be able to:

1. Understand the SPD CT1 the 4+0 connection method for TN systems
2. Understand the SPD CT2 the 3+1 connection method for a TT system
3. Understand the LPZ concept describes the installation of Type 1, Type 2 and Type 3 SPDs
4. Understand consideration in the selection of SPDs using voltage and current characteristics
5. Understand the 10m rule for SPDs in BS 7671
6. Understand the danger of dynamic voltage drop in the SPD connection leads
7. Understand the requirements for energy coordination of two or more SPDs and application conflict between spark gap and varistor type of SPDs
Who should learn
The course will be useful for those who are involved with the design, installation, inspection, certification and approval/review of a non-complex electrical installation meeting BS7671 requirements for surge protection.
Other relevant courses available