Technical FAQs

Ask a Question

What is the maximum earth loop impedance ZS value of NSX MCCB?

First determine if the NSX breaker is equiped with Thermal Magnetic (TMD) or Electronic (Micrologic) trip unit. then choose the relevant document of the attachments
For NSX with Micrologic 5 then please use the same tables as Micrologic 2.

NOTE: The Zs values attached include the Cmin factor as per BS7671:2015 Amendment 3
Was this helpful?
What can we do to improve the information ?