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interests / alt.home.repair / Re: Why do circuit breakers go up for on and down for off?

SubjectAuthor
* Why do circuit breakers go up for on and down for off?Clare Snyder
`* Why do circuit breakers go up for on and down for off?Cindy Hamilton
 +* Why do circuit breakers go up for on and down for off?Clare Snyder
 |`* Why do circuit breakers go up for on and down for off?Xeno
 | `- Why do circuit breakers go up for on and down for off?Commander Kinsey
 `* Why do circuit breakers go up for on and down for off?Xeno
  `- Why do circuit breakers go up for on and down for off?Commander Kinsey

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Re: Why do circuit breakers go up for on and down for off?

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From: cla...@snyder.on.ca (Clare Snyder)
Newsgroups: alt.home.repair
Subject: Re: Why do circuit breakers go up for on and down for off?
Date: Wed, 15 Feb 2023 02:13:42 -0500
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 by: Clare Snyder - Wed, 15 Feb 2023 07:13 UTC

On Tue, 14 Feb 2023 12:31:21 +0000, Max Demian
<max_demian@bigfoot.com> wrote:

>On 13/02/2023 19:57, Commander Kinsey wrote:
>> On Sat, 11 Feb 2023 18:30:39 -0000, Carlos E.R.
>> <robin_listas@es.invalid> wrote:
>>> On 2023-02-11 13:23, Commander Kinsey wrote:
>>>> On Sat, 11 Feb 2023 11:58:23 -0000, Carlos E.R.
>>>> <robin_listas@es.invalid> wrote:
>
>>>>> But reverse screws do exist.
>>>>
>>>> They shouldn't.
>>>
>>> Disassemble a house fan, and you will see one such reverse bolt, and
>>> understand why they exist :-)
>>
>> WTF is a house fan?  Kitchen extractor?  Ceiling fan?
>>
>> There is no reason, unless you think the blades must rotate in a
>> particular direction for some reason.
>
>They do if you want them to blow rather than suck.
Blades are not flat - they are curved (airfoils) so are much more
effective one way than the other

Re: Why do circuit breakers go up for on and down for off?

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Newsgroups: alt.home.repair
From: hamil...@invalid.com (Cindy Hamilton)
Subject: Re: Why do circuit breakers go up for on and down for off?
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 by: Cindy Hamilton - Wed, 15 Feb 2023 10:09 UTC

On 2023-02-15, Clare Snyder <clare@snyder.on.ca> wrote:

> Blades are not flat - they are curved (airfoils) so are much more
> effective one way than the other

Depends on the fan. My ceiling fan blades are pretty flat. They're
designed to switch rotation direction for summer/winter operation.

--
Cindy Hamilton

Re: Why do circuit breakers go up for on and down for off?

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From: cla...@snyder.on.ca (Clare Snyder)
Newsgroups: alt.home.repair
Subject: Re: Why do circuit breakers go up for on and down for off?
Date: Thu, 16 Feb 2023 01:08:55 -0500
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 by: Clare Snyder - Thu, 16 Feb 2023 06:08 UTC

On Wed, 15 Feb 2023 10:09:51 GMT, Cindy Hamilton
<hamilton@invalid.com> wrote:

>On 2023-02-15, Clare Snyder <clare@snyder.on.ca> wrote:
>
>> Blades are not flat - they are curved (airfoils) so are much more
>> effective one way than the other
>
>Depends on the fan. My ceiling fan blades are pretty flat. They're
>designed to switch rotation direction for summer/winter operation.
Also very slow turning and very inefficient

Re: Why do circuit breakers go up for on and down for off?

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From: xenol...@optusnet.com.au (Xeno)
Newsgroups: alt.home.repair
Subject: Re: Why do circuit breakers go up for on and down for off?
Date: Wed, 10 May 2023 18:20:41 +1000
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 by: Xeno - Wed, 10 May 2023 08:20 UTC

On 15/2/2023 9:09 pm, Cindy Hamilton wrote:
> On 2023-02-15, Clare Snyder <clare@snyder.on.ca> wrote:
>
>> Blades are not flat - they are curved (airfoils) so are much more
>> effective one way than the other
>
> Depends on the fan. My ceiling fan blades are pretty flat. They're
> designed to switch rotation direction for summer/winter operation.
>
Bi-directional blades wouldn't be able to efficiently use the airfoil
effect both ways so flat blades will be equal efficiency both ways.

That said, the ceiling fan above my head has airfoil shaped stainless
steel blades and it can be set for both directions of rotation.
Obviously preference made for the primary flow direction - down!

--
Xeno

Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)

Re: Why do circuit breakers go up for on and down for off?

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From: xenol...@optusnet.com.au (Xeno)
Newsgroups: alt.home.repair
Subject: Re: Why do circuit breakers go up for on and down for off?
Date: Wed, 10 May 2023 18:21:21 +1000
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 by: Xeno - Wed, 10 May 2023 08:21 UTC

On 16/2/2023 5:08 pm, Clare Snyder wrote:
> On Wed, 15 Feb 2023 10:09:51 GMT, Cindy Hamilton
> <hamilton@invalid.com> wrote:
>
>> On 2023-02-15, Clare Snyder <clare@snyder.on.ca> wrote:
>>
>>> Blades are not flat - they are curved (airfoils) so are much more
>>> effective one way than the other
>>
>> Depends on the fan. My ceiling fan blades are pretty flat. They're
>> designed to switch rotation direction for summer/winter operation.
> Also very slow turning and very inefficient

Yes, and don't use a lot of power either.

--
Xeno

Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)

Re: Why do circuit breakers go up for on and down for off?

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Subject: Re: Why do circuit breakers go up for on and down for off?
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 by: Commander Kinsey - Fri, 9 Jun 2023 08:19 UTC

On Wed, 10 May 2023 09:20:41 +0100, Xeno <xenolith@optusnet.com.au> wrote:

> On 15/2/2023 9:09 pm, Cindy Hamilton wrote:
>> On 2023-02-15, Clare Snyder <clare@snyder.on.ca> wrote:
>>
>>> Blades are not flat - they are curved (airfoils) so are much more
>>> effective one way than the other
>>
>> Depends on the fan. My ceiling fan blades are pretty flat. They're
>> designed to switch rotation direction for summer/winter operation.
>>
> Bi-directional blades wouldn't be able to efficiently use the airfoil
> effect both ways so flat blades will be equal efficiency both ways.
>
> That said, the ceiling fan above my head has airfoil shaped stainless
> steel blades and it can be set for both directions of rotation.
> Obviously preference made for the primary flow direction - down!

It's just a fan. It will push both ways equally.

But I see no point in pushing up. You want air blown onto you for cooling.

Re: Why do circuit breakers go up for on and down for off?

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Subject: Re: Why do circuit breakers go up for on and down for off?
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 by: Commander Kinsey - Fri, 9 Jun 2023 08:20 UTC

On Wed, 10 May 2023 09:21:21 +0100, Xeno <xenolith@optusnet.com.au> wrote:

> On 16/2/2023 5:08 pm, Clare Snyder wrote:
>> On Wed, 15 Feb 2023 10:09:51 GMT, Cindy Hamilton
>> <hamilton@invalid.com> wrote:
>>
>>> On 2023-02-15, Clare Snyder <clare@snyder.on.ca> wrote:
>>>
>>>> Blades are not flat - they are curved (airfoils) so are much more
>>>> effective one way than the other
>>>
>>> Depends on the fan. My ceiling fan blades are pretty flat. They're
>>> designed to switch rotation direction for summer/winter operation.
>> Also very slow turning and very inefficient
>
> Yes, and don't use a lot of power either.

They make too much noise in the bedroom at night.

interests / alt.home.repair / Re: Why do circuit breakers go up for on and down for off?

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