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Topic Title: Exposed 33 kV cable joint Topic Summary: Created On: 24 May 2012 01:38 PM Status: Post and Reply |
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 24 May 2012 01:38 PM
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Dear IET members,
I'm working on an installation where the HV contractor pulled a cable to short so one of the phases was not long enough to reach its destination switchgear. The HV contractor has installed an 'in air' joint to allow the distance to be covered. I'm wondering if this raises the risk for personnel working in the HV area when the cables are energised? In my experience joints are usually made in a jointing trench and buried out of the way, if they fail there will be no harm caused. I've asked around and opinion appears to vary on this, any advice would be greatly appreciated! |
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25 May 2012 04:11 PM
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Joints are statistically less reliable than cable and therefore risks to personnel would be higher; however the likelihood of a fault is very low, provided the joint is made correctly, so the increase in risk is probably not significant. Joints can often be found installed in air, on cable trays for example. However, I cannot comment on the appropriateness of the solution in this instance. I would add that, assuming this is in the UK, the HV Contractor has a duty of care under CDM.
------------------------- irevans |
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Exposed 33 kV cable joint
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