BS 7671 Archives - Pro Certs Software

Convert Old Zs Values to 18th Edition Zs Values

Convert Zs values from a previous version of BS 7671 to BS 7671 18th edition 230v Cmin values.

Bathroom Zones

Bathroom zones and the specification and minimum requirements of electrical equipment within a room containing a bath or shower.

BS 7671 Reference Methods

Installation Reference Method table for your electrical certificates & determining the current carrying capacity of a cable.

Cable Limiting Temperature Time Calculator

Protection Against Exceeding Cable Limiting Temperature

Calculate how long a cable will take to reach its limiting temperature under fault conditions.

AFDD Max Zs Values

Here we answer a common question we keep getting asked: What is the max Zs for AFDD’s?

Socket in a Bathroom

Are sockets in bathrooms permitted or not? Read more to find out if a socket is permitted in a bathroom.

Spurs in Bathrooms

Are spurs in bathrooms permitted? Yes, but only if certain conditions are met, read more to find out what those conditions are.

Pre-order BS 7671 Amendment 2 2022

BS 7671 18th Edition Amendment 2 2022 is now available to pre-order.

How to calculate diversity and maximum demand

Diversity Calculator App: How to calculate total connected load, apply diversity and calculate the maximum demand, with examples. Download for iOS + Android.

Cooker Switch Distance from a Hob or Cooker

Guidance on the minimum distances electrical accessories such as sockets and switches can be installed from an oven, hob or free standing cooker.

Category: BS 7671

Convert Old Zs Values to 18th Edition Zs Values

Bathroom Zones

BS 7671 Reference Methods

Protection Against Exceeding Cable Limiting Temperature

AFDD Max Zs Values

Socket in a Bathroom

Spurs in Bathrooms

Pre-order BS 7671 Amendment 2 2022

How to calculate diversity and maximum demand

Cooker Switch Distance from a Hob or Cooker

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