Re: Audio Precision System One Dual Domani Measuirement Systems

[Jerry]

message

<snip>
: Just counted up how many double 13A sockets we've just put into
the
: refurbished *half* of this place: 38. That makes for one
helluva fuse
: board if each was a radial... They are split over four rings as
it
: is.
:

You still can run more that three 3Kw electric fires off each
ring circuit, thus how many of these sockets are for power and
how many are basically going to be over spec floor/table lighting
points[1]? As for panel size, no one has said otherwise, but
probably not as large as you might be imagining.

[1] which, if so, are probably better feed off the lighting
circuits, which then allows for remote switching if more
convenient

 

[J. P. Gilliver (John)]

In message <[email protected]>, Don Pearce

We mix our units much more than that. Take temperatures - if it is
near freezing we use Centigrade, when it is hot we use Fahrenheit.

[]
I suspect that for a lot of us, it's only the media - in fact, only the
print media - who do this. I think in Celsius for both: thirtysomething
is too hot for me, much below twenty (unless there's absolutely no wind)
too cold. Our weather forecasts have been in C for some decades, albeit
with the forecaster giving the F equivalent verbally (but not visually).

 

[J. P. Gilliver (John)]

Yes, people used to be taught things like spelling and multiplication
tables in school. I used to get my pocket money in shillings and pence,
occasionally shops would give change that would include farthings, and I
don't recall having any problems with this.

It was a world in which spellcheckers and calculators hadn't been
invented yet, and in their spare time, brainrotting electronic gadgets
like MP3 players and video game consoles not having been invented yet,
people would sometimes read books. We grew up in it and got used to it.

Rod.

Aw, c'mon, Rod - although there are _some_ advantages in having these
old skills, it is as unrealistic to consider them as essential now that
we have things which do them for us as the skill of making our own
clothes, copperplate handwriting, and so on. (_All_ of these are useful,
just not as essential as they once were.) As for mp3 players and video
consoles being brainrotting, I don't think they are any more so than
gramophones, playing cards, dominoes, rallies, ... (-:

As for books, there may be some evidence that the recent rise of the
kindle and its friends has _increased_ reading. (Whether of the sort of
books you'd approve of, of course ... but it was ever thus, even when
dead trees ruled the roost.)
--
J. P. Gilliver. UMRA: 1960/<1985 MB++G.5AL-IS-P--Ch++(p)Ar@T0H+Sh0!:`)DNAf

The reason for the oil shortage: nobody remembered to check the oil levels. Our
oil is located in the North Sea but our dip-sticks are located in Westminster.
(or Texas and Washington etc. - adjust as necessary!)

 

[Dave Plowman (News)]

Yes pet, a 15amp breaker has the same rating as 30amp breaker if
you say so... One is far more likely to have an appliance lead
that is rated at 15A, even for appliances that have internal 1amp
fuses, rather than such an appliance having a lead that one could
run a domestic -four ring, grill and oven- cooker off...

Thanks for confirming we can add flex ratings to the things you know
nothing about.

 

[Dave Plowman (News)]

The great advantage of radial circuits is that idiots find it a
little more difficult to bridge out the breaker in the panel,
unlike the silly fuse fitted in BS1363 plugs (which for some
silly reason is the same shape and diameter as many screws, bolts
and any other round bar)

Wonder how you know all this? Just who ever wants to draw more than 13
amps from a socket anyway?

Oh yes - I remember. You used to work in a garage and probably did just
that since because it didn't have the correct wiring installed.

Not everyone is as stupid as you Jerry.

 

[Dave Plowman (News)]

: 'The same hardware' as used for radial circuits is not suitable
for final
: ring circuits. As I keep saying, you need to learn some
fundamentals
: instead of making a fool of yourself.
:

Hmm, if correct then every spur off a ring circuit is breaking
the regs!

You obviously haven't read them. And certainly don't understand the basics.

 

[Dave Plowman (News)]

You still can run more that three 3Kw electric fires off each
ring circuit, thus how many of these sockets are for power and
how many are basically going to be over spec floor/table lighting
points[1]?

All you have in your place is electric fires and table lamps? Explains it
all.

 

[S Viemeister]

... except pints and gallons of course. The US "English" system has
never been used in England.

And US fluid ounces are just a bit different, too.

 

[Dave Plowman (News)]

... except pints and gallons of course. The US "English" system has
never been used in England.

IIRC, it has. The UK one was changed sometime after US independence. They
stuck to the old units, understandably.

 

[S Viemeister]

IIRC, it has. The UK one was changed sometime after US independence. They
stuck to the old units, understandably.

Yup.

 

[J. P. Gilliver (John)]

Thanks for confirming we can add flex ratings to the things you know
nothing about.

Conductors rated at only 1A are very thin - sufficiently so that they do
not have great mechanical strength. Therefore Jerry's statement that
mains leads (in US: line cords) are likely to have a higher rating than
absolutely necessary is valid. Especially if they're of the sort that
has a connector at both ends: if there's a chance that they might be
used for an appliance that draws more, then it is unwise to use
low-current wire/cable for them.

(I am not on either side in the argument between Jerry and others: I
live in UK, but still find ring mains odd.)

 

[Don Pearce]

(I am not on either side in the argument between Jerry and others: I
live in UK, but still find ring mains odd.)

Why do you find ring mains odd? Once you have daisy chained all the
sockets it is an extremely sensible idea to complete the loop back to
the distribution board. For the cost of a few feet of cable, you have
halved both the effective resistance of the mains and the distance to
the furthest socket. I can't imagine a single reason not to do it.

d

 

[J. P. Gilliver (John)]

Why do you find ring mains odd? Once you have daisy chained all the
sockets it is an extremely sensible idea to complete the loop back to

If you happen to have laid them out in a ring manner anyway, yes.

the distribution board. For the cost of a few feet of cable, you have
halved both the effective resistance of the mains and the distance to
the furthest socket. I can't imagine a single reason not to do it.

d

I can see the halving of the resistance (well, at the most remote point
anyway), but not the halving of the distance.

I think maintenance (I mean when modifying, not just general wear and
tear): most extras added to ring mains are spurs. (Also, instinctively,
it's easier to know when one is isolated with a spur, though that
shouldn't be done that way.)

 

[Dave Plowman (News)]

If you happen to have laid them out in a ring manner anyway, yes.

Why wouldn't you? There are less runs back to the CU than doing the same
with radials, so surely not too difficult to design?

I can see the halving of the resistance (well, at the most remote point
anyway), but not the halving of the distance.

I think maintenance (I mean when modifying, not just general wear and
tear): most extras added to ring mains are spurs. (Also, instinctively,
it's easier to know when one is isolated with a spur, though that
shouldn't be done that way.)

You are allowed to add spurs within the regs, but why is it so much more
difficult to simply add a socket properly to the ring?

 

[Dave Plowman (News)]

Conductors rated at only 1A are very thin - sufficiently so that they do
not have great mechanical strength.

Where will you find an appliance sold fitted with 1A flex and a 13 amp
plug?

Therefore Jerry's statement that
mains leads (in US: line cords) are likely to have a higher rating than
absolutely necessary is valid.

All appliances now sold in the UK (and elsewhere in Europe) are capable of
blowing a 13 amp fuse in event of a fault on the line chord.

Especially if they're of the sort that
has a connector at both ends: if there's a chance that they might be
used for an appliance that draws more, then it is unwise to use
low-current wire/cable for them.

Same with extensions etc sold in the UK.

(I am not on either side in the argument between Jerry and others: I
live in UK, but still find ring mains odd.)

I can understand this, as practice is what matters. Diversity loading.
Not some theoretical maybe as Jerry insist on bringing up - even although
it has been explained to him time and time again.

Final ring circuits are for domestic premises only. For workshops or
offices where you have known fixed loads you'd stick to radials. As you'd
do for fixed heating in a domestic scenario.

 

[J G Miller]

After all, the Right side is the right side...

Will somebody not think of the bus drivers?

Is it easier for bus drivers to take fares and issue tickets
to people boarding the bus from the left hand side or the
right hand side when usually most bus drivers are right handed?

 

[Don Pearce]

If you happen to have laid them out in a ring manner anyway, yes.


I can see the halving of the resistance (well, at the most remote point
anyway), but not the halving of the distance.

For the most remote socket, the distance can be reduced to almost zero
by completing the loop (assuming the run goes around the house and
almost back again. For any socket beyond half distance, the run is
reduced. Half was just an estimate.

I think maintenance (I mean when modifying, not just general wear and
tear): most extras added to ring mains are spurs. (Also, instinctively,
it's easier to know when one is isolated with a spur, though that
shouldn't be done that way.)

Spurs are allowed on a ring main, but to a single point only (which
can of course be a double socket).

d

 

[J G Miller]

and German and...

Most of the map at <http://en.wikipedia.ORG/wiki/Right-_and_left-hand_traffic>
is red.

 

[Don Pearce]

Most of the map at <http://en.wikipedia.ORG/wiki/Right-_and_left-hand_traffic>
is red.

The good bits are blue.

d

 

[JohnT]

Will somebody not think of the bus drivers?

Is it easier for bus drivers to take fares and issue tickets
to people boarding the bus from the left hand side or the
right hand side when usually most bus drivers are right handed?

It must be a long time since you were last on a bus.