NBSL1-100 RCD 230/400V Rated Voltage
This is a replacement double pole ( also know as a dual pole ) RCD that suits caravan and motorhome mains consumer units.
A residual current device monitors your wiring installation permanently to detect any leaking current. How? It continuously measures the amount of current passing through a wire in one direction, and again through a different wire in the opposite direction.
The NBSL1-100 parts are made of fire resistant and shock resistant plastics and therefore it should have a long life expectancy. This product is marked as meeting the IEC61008-1 standard.
There are two rail securing clips on the rear should you wish to mount them in this way.