Electrical Blog

MCCB Zs Values

MCCB Max Zs Values

Maximum earth loop impedance values (Zs) for BS EN 60947-2 MCCB’s vary between manufactures. Find the correct chart with the Max Zs Values app.

60942-7 Max Zs Tables

60947-2 Max Zs Charts

Print or download max Zs tables for BS EN 60947-2 protective devices with the max zs values app.

Electrical Apps for Electricans

Cable Calculator App Update – 2019

Another update to the cable sizing calculator, Cable Calc. Find out what’s new in this version.

How to Calculate kVA

How to Calculate kVA

Learn how to calculate to and from kVA, Amps, kW, Volts and Power Factor, with single phase and three phase calculation examples.

Kitchen Zones

Local Isolation for Kitchen Appliances

Recommended locations of local isolators and fused spurs for kitchen appliances, distances and locations to be readily accessible, find out here.

Socket Distance From a Sink

Distance of a socket from a sink

Recommendations and guides on locating sockets, spurs and isolators near a kitchen sink. Electrical accessories should be located at a safe distance from sink or drainer unit.

Max Zs Values

Max Zs Values App Update for 2019

We have published an update to the Max Zs Values app, find out what great new features this 2019 version brings.

EICR Codes

How to code observations on a condition report

A guide to selecting and coding EICR observations. EICR codes include C1, C2, C3, FI and N/V, find out what they mean and how to use them.

18th Edition Zs Values

Max Zs Values 18th Edition BS 7671

Learn how to calculate the maximum earth loop impedance values to the 18th edition of the wiring regulations. 100% and temperature adjusted Zs.

Surge Protection Types

SPD Surge Protection Devices – Types & Uses

Discover the types of SPD’s and the application of surge protection devices.

BOOKS & TOOLS
BS 7671 18th Edition Wiring Regulations +A2:2022BS 7671 18th Edition Amdendment 2  
On-Site Guide (BS 7671:2018+A2:2022)On Site Guide  
IET Guidance Note 3: Inspection and Testing +A2:2022IET Guidance Note 3  
CalCard Calibration CardCalCard
NAPIT EICR Codebreakers - Amendment 2NAPTI Codebreakers  
Megger Test LeadsMegger Test Leads  
Megger 13A Plug Test LeadMegger 13A Plug Test Lead  
Megger MFT1741 Multifunction TesterMegger MFT1741  
Fluke T130 Voltage and Continuity Tester  
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