Stroma Certification is offering electricians a range of free data sheets to download regarding current carrying capacity, cable resistance and voltage drop and maximum values of earth loop impedance.
BS 7671 requires every electrical installation to be designed. The designer of the installation also has a requirement to certify the design is compliant with BS 7671 by signing the Electrical Installation Certificate. As part of an electrical installation, the required cross-sectional area of the live conductors and the cross-sectional area of protective conductors must be calculated. An alternative to this is to use Standard Circuits as tabulated in the IET On-Site Guide or the IET Guidance Note 1 (Selection & Erection).
To assist contractors to verify cable calculations, Stroma Certification has produced a number of guidance charts which include:
- Current Capacities for PVC Twin & Earth Cables
- Maximum Cable Lengths for Resistance and Voltage Drop
- Maximum Values of Earth Loop Impedance
These handy documents are just one of the benefits which Stroma Certification offers and can act as a ready reference to help electricians check their calculations against BS 7671.
Even more benefits
Stroma Certification is one of the UK’s leading Competent Person Scheme providers, offering Part P/Domestic, Commercial Electrical, Third Party Verification for Part P, Periodic Inspection and Testing and issuing Electrical Installation Condition Reports and Portable Appliance Testing Certification for one great-value fee.
These schemes are developed by time-served tradespersons and include an extensive benefits package comprising TrustMark membership (£50 +VAT), online notification portal, certificate generation software and much more in addition to data sheets, regular technical guidance and industry updates.
Stroma Certification will be attending Elex Show throughout 2018. Register your place for free and talk to the team about the benefits of electrical membership with Stroma.
Download: To download your copy of Stroma Certification’s Data Sheets, please fill out this simple form.
For more information and technical expertise, please visit stroma.com/certification