Cable sizing for safety and in accordance with the 17th Edition
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Sizing cables correctly is essential to obtain best and most efficient use out of them, but it is also essential for the safety of people, electrical equipment, plant and buildings, because an undersized cable can easily overheat and, possibly, cause a fire. Oversized cables will be a waste of money. Yet the sizing of cables, while not hugely difficult, still requires some knowledge, so this VoltiTECH takes a look at the issues and provides an answer.
Newsletter | | | | Cable sizing for safety and in accordance with the 17th Edition | | | 
James Hunt
Managing Editor | | Dear User Sizing cables correctly is essential to obtain best and most efficient use out of them, but it is also essential for the safety of people, electrical equipment, plant and buildings, because an undersized cable can easily overheat and, possibly, cause a fire. Oversized cables will be a waste of money. Yet the sizing of cables, while not hugely difficult, still requires some knowledge, so this VoltiTECH takes a look at the issues and provides an answer. Find out more about James' monthly report with his introductory article. Important Note: VoltiBULLETIN becomes VoltiTECH! We hope you like the new design of our monthly technical newsletter. We believe you will find it easier to extract the information you need as well as enjoy the new look and feel. You will still find the same rich technical content and, in many cases, the VoltiTECH will have CPD accreditation as it did in the past. We have changed the name to VoltiTECH, to better reflect the themes and content of the newsletter and to bring us more into line with what we do in other Voltimum countries. If you have any comments on the new design or on VoltiTECH in general we would love to hear them. Make your comment here. |  | Why ignore voltage drop on the return/neutral cable? Question: Reference methods 100 and 101 refer to twin & earth (T/E) cable installed within various thickness of insulation. What reference method should I use when cable is installed on top of any insulation? | |  |
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 | ... this month's practical snag and its solution from the NICEIC
Two-way switching using the cpc
Circuit protective conductors of flat twin and earth cables should not be used for any other purposes.
A potentially dangerous snag is the use of the circuit protective conductor of a flat twin and earth cable as a live conductor in a two-way switching circuit. Danger may arise because an electrician working on the installation at a future date may, reasonably, make the assumption that the centre conductor is at Earth potential.
| |  | | | | | | This article is extracted from Snags and Solutions Part 1 or Part 2 published by the:  |
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