When reconnecting a H.E.I.U., which cable must be reconnected first?
- It makes no difference.
- L.T. before H.T.
- H.T. before L.T.
Explanation from PART66Online
A high energy ignition unit stores a lethal charge, so on reconnection the high tension lead is fitted to the igniter plug first and the low tension supply is restored afterwards. Connecting the low tension supply first could energise the unit with the high tension output open circuit. On disconnection the order is reversed, the low tension supply being removed first and the unit left to discharge before the high tension lead is touched.
P
praveen asked · 29 Aug 2014
Can anybody explain why?
Community Comments (1)
M
muzza212@btinternet.com
27 Dec 2014
You reconnect HT before LT. The simple reason being safety. HT leads carry high current, if the LT lead is disconnected when you are working with HT leads there is no chance of HT electrical shock.
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