BS 7671 - British Standard

BS 7671

BS 7671 - British Standard

Ensure Compliance with BS 7671 Standard using Trusted Calculations
ETAP BS 7671 Cable Sizing & Shock Protection provides a comprehensive and accurate module in compliance with the latest British Standard 7671 standard for design and sizing of low voltage cables. ETAP Cable Sizing software suite offers powerful features to save time and improve accuracy for cable calculation and electrical design of phase, neutral and earth conductors. 
BS 7671
  • Quickly & accurately calculate cable sizes per BS 7671:2018
  • Complete Sizing & Electric Shock Protection module
  • Cable Model Forms per BS 7671:2018+A2:2022
  • Extensive cable libraries including BS 7671 regulation cable types
  • Fully integrated with load flow, short circuit & protective device coordination modules
  • Simulation & alerts based cable size adequacy using 'what if' scenarios
  • Intelligent cable current carrying capacity assessment & temperature correction
  • Current carrying capacity evaluation for various cable layouts

Cable Raceway Installations

ETAP’s cable capacity calculation handles both above ground (A/G) and underground (U/G in duct and buried) installations:

  • A/G Conduit (thermally insulated wall, attached to wall, masonry, unventilated or ventilated channel)
  • A/G Trays (perforated, unperforated)
  • Air Drop (suspended, on insulators)
  • Architrave 
  • Window Frame
  • Building Voids (direct, conduit, ducting, ceiling, suspended floor)
  • Brackets
  • Chanel (open, ventilated)
  • Embedded Direct (thermally insulated wall, mouldings, masonry)
  • Ladder
  • Wire Mesh
  • Open & Clipped Direct (on wall, under ceiling, spaced from ceiling)
  • Trunking (on wall, suspended, flush floor, skirting)
  • U/G Duct
  • U/G Buried (direct, conduit)
  • Masonry (cable ducting)
BS 7671 Cable Raceway Installation Types

 

Jacket Layer

A Jacket in ETAP is treated as non-metallic sheath for BS 7671 based calculation. Therefore, for cable capacity calculations based on BS 7671, it is considered that the cable has a sheath layer if the cable has either a sheath layer or a jacket layer.

 

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