The Crabtree E60 double pole 60 Amp V.O.E.L.C.B. was a very popular solid well made device. I still come across them and they still work well. They are sold on Flebay as well. The earth electrode is ESSENTIAL to the correct operation of the V.O.E.L.C.B., so if the earth  electrode has rotted away or the insulated electrical cable from the "E" terminal of the device to the earth electrode in the ground is not intact because somebody has pruned through it at a flower bed the V.O.E.L.C.B. will NOT function at all. This originally may have only been a 2.5mm2 cable. The test button confirmed the existence of a good earthing lead to the earth electrode, and if it was not correct the device would not trip off when the test button was pressed, unlike a modern R.C.D. An R.C.D. just tests the internal workings of the device and not the condition of the installation earthing. The test button of the V.O.E.L.C.B. confirms the correct operation and condition of the whole device and earth electrode.


A Cratree E60 that I have here boasts an internal detection trip coil of 500 Ohms. resistance. The minimum tripping current is 35 mA. The maximum earth resistance is to be no more than 500 Ohms. Some of these devices have an internal overload device like an M.C.B.


I would have no hesitation in re-using a Crabtree E.60 for my personal use where the installation's metalwork was independent of any neighbouring house. I have refurbished some for fun. The are just so well made.


They work like a Voltmeter looking for a Voltage of about 25 to 50 Volts whether that Voltage originates from inside your own installation or originates from an outside source. It can not tell the difference.


This is a video about it by John Ward.....https://www.youtube.com/watch?v=0s7Wqivg0lw

Z.

The Crabtree E60 double pole 60 Amp V.O.E.L.C.B. was a very popular solid well made device. I still come across them and they still work well. They are sold on Flebay as well. The earth electrode is ESSENTIAL to the correct operation of the V.O.E.L.C.B., so if the earth  electrode has rotted away or the insulated electrical cable from the "E" terminal of the device to the earth electrode in the ground is not intact because somebody has pruned through it at a flower bed the V.O.E.L.C.B. will NOT function at all. This originally may have only been a 2.5mm2 cable. The test button confirmed the existence of a good earthing lead to the earth electrode, and if it was not correct the device would not trip off when the test button was pressed, unlike a modern R.C.D. An R.C.D. just tests the internal workings of the device and not the condition of the installation earthing. The test button of the V.O.E.L.C.B. confirms the correct operation and condition of the whole device and earth electrode.


A Cratree E60 that I have here boasts an internal detection trip coil of 500 Ohms. resistance. The minimum tripping current is 35 mA. The maximum earth resistance is to be no more than 500 Ohms. Some of these devices have an internal overload device like an M.C.B.


I would have no hesitation in re-using a Crabtree E.60 for my personal use where the installation's metalwork was independent of any neighbouring house. I have refurbished some for fun. The are just so well made.


They work like a Voltmeter looking for a Voltage of about 25 to 50 Volts whether that Voltage originates from inside your own installation or originates from an outside source. It can not tell the difference.


This is a video about it by John Ward.....https://www.youtube.com/watch?v=0s7Wqivg0lw

Z.