Moderately-sized house with an elderly electrical installation and a60A incomer from the street at the front.Huge separate shed at the back, previously a bakery, which until a fewyears ago had 3 phase running to it for the ovens. This was suppliedfrom an overhead pole at the back, which is still there and so closeas to have a wayleave for being on the plot. At present there's nocredible electricity supply to the shed. The house is likely to need afull re-wire too.My plan is to use the shed to house vast woodworking machinery, whichcomes much cheaper (and works a bit better) if it's 3-phase.There's another shed, adjoining the house. This would need a highcurrent single-phase supply for welder(s). I doubt I'll ever go for a3-phase welder.So, what's to do?Plan A:Have the house feed uprated to 80A or 100A single phase. Rewire house.Run armoured cable u/g to each shed. Run phone and network cable toshed. Stick with single phase machinery. Ignore crazy ideas likesingle to 3-phase rotary converters. Buy expensive motors to convertnew machines from 3 to 1.Plan B:Have the 3 phase supply to the shed re-instated. Pay some no-doubtconsiderable amount for the same.Wire the isolated shed woodworking rig from the 3 phase, wonderingwhether I'm going to be paying commercial electrician rates to have itdone.Rewire the house anyway, as it needs it.Wire the "welding" shed alongside the house from somewhere, either thehouse or the shed supply.Watch the data cables explode when there's an argument over earthpotentials.Any advice or experience to share? Plan B is obviously attractive andgives the "best results", but the process of achieving it is likely tobe more complicated and expensive.

In message , John Rumm writes"O" levels were 1-6 (pass), 7-9 (fail) when I took them"A" levels were A-E (pass), F-Fail IIRC

3 phase electrics to a shed?

Jun 12, 2008 32 Replies

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Bob Eager 18 years ago

Not in my day. GCSEs were graded 1 to 9, with 1-6 being a pass and 7-9 a fail. Circa 1966.

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Bob Minchin 18 years ago

I don't think GCSEs were around in 1966. GCE yes and maybe just about the start of CSE.

Bob

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Bob Eager 18 years ago

Sorry. I meant GCE O levels of course. Think my brother took CSEs in

1967.

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geoff 18 years ago

"O" levels were 1-6 (pass), 7-9 (fail) when I took them

"A" levels were A-E (pass), F-Fail IIRC

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Bruce 18 years ago

GCSEs took over from GCE 'O' Levels and CSEs in 1988.

CSE examinations were introduced in 1965 and ran alongside the well established GCE 'O' Levels, which had replaced the School Certificate back in 1951.

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Frank Erskine 18 years ago

In the 1960s they were graded 1 to 9.

7,8 and 9 were fails.

This was with Uni of Cambridge LES.

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Andy Hall 18 years ago

O levels were graded by letter by some examining boards and my number by others.

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<me9 18 years ago

Frank did Cambridge GCEs many years ago, 2 or 3 years after me. They were graded 1-6 as a pass, 7 & possibly 8 as a fail. Grade 2 would probably rate an A* these days.

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Andy Dingley 18 years ago

When were S levels? I did Physics S in '82 along with my A levels and had a numeric result for the S, but letters for O and A

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dennis 18 years ago

JMB were graded numerically at O'level. I remember because I took an AEB O'level because they were easier than JMB and they were graded A-E.

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dennis 18 years ago

Top 80%, probably A**

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Tony Bryer 18 years ago

S levels were A levels + IIRC meant mainly for those aiming for Oxbridge

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Bruce 18 years ago

Duh. Dunno. After my time, probably. ;-)

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