[GreenKeys] 2 1/2A SCREW IN FUSE

Mon Aug 14 21:02:52 EDT 2017

@Bruce & All,

Any sense as to why the utils are so resistant to installing 3-ph in
domestic settings? Between the drastic hookup costs and the minimum bill,
it's clear they really don't like doing this.

I wouldn't know enough about AC power engineering to even hazard a guess.
But all in all, if the 3-ph motors are so much more efficient, you'd think
the utils would encourage use of 3-ph, as it lightens their load and makes
things easier to manage and cheaper for all customers.

No? What's the big hang up?

On Mon, Aug 14, 2017 at 2:50 PM, Bruce Gentry <ka2ivy at verizon.net> wrote:

> You don't need the third service IF  the second service uses one of the
> "hots" the first one does not. I have done it- it works fine. In my dorm
> room at Griffiss AFB in 1972, I found  that three of the outlets in my room
> were on different circuits. By unbelivable fortune, the hots were all
> different phases. I also found a similar setup between two geeky neighbors
> in central New York. The street was wired with 4 wire 120/208. They
> discovered  they had all three hots between them. Two wires were buried
> between their houses, now one person could power his pipe organ blower and
> the other his lathe and milling machine, not to mention their very
> inexpensive air conditoners from the junk store. They agreed that the added
> bill from one equalled the added bill from the other, so they paid their
> bills quitely and no one was the wiser.
>
>        Bruce Gentry, KA2IVY
>
>
>
>
> On 8/14/17 2:37 PM, Pete Lancashire wrote:
>
> Pretty much all single phase today.
>
> There were trials done in a few locations where residential electrical
> demand was high Phoenix AZ in the summer,
> There are still a few 'burbs where the houses have 3 phase. This was when
> electricity in many parts of the USA
> was 'free' and you A/C'ed your house in the desert, watered the lawn
> 365/year, etc.
>
> Back closer to home, Portland Oregon I have friend who has next to his
> house a no longer used cannery. His
> house is fed from one of the three pole transformers. When He built his
> shop he asked how much to feed his
> shop with 3PH, all three transformers where there. Was something like USD
> 5,000.
>
> I remember joking with him. your house is on Phase A, get the shop on
> Phase B and build a shed and have
> it put on Phase C, .. can't say what my next suggestion was :-)
>
> Residential here is around $15/month not including the KWH's
>
> On Mon, Aug 14, 2017 at 9:54 AM, Bruce Gentry <ka2ivy at verizon.net> wrote:
>
>> Most ulilities in the USA are extremely reluctant to provide three phase
>> to single residences unless the customer is willing to pay thousands in
>> installation costs and agree to a signifigent minimum bill regardless of
>> the amount used. They will do this even if the three transformers are
>> already on the pole in front of your house feeding an apartment building
>> across the street. Many people needing or wanting elevators in their homes
>> or wanting to restore and install pipe organs have been seriously
>> discouraged because of these policies. Many air conditioners, larger
>> appliances, and residential elevators today have three phase motors powered
>> by inverters that convert single phase to three. Single phase AC motors are
>> less efficient- sometimes drastically- than a three phase. Their windings
>> are more complex, starting switches and condensors add cost size and
>> complexity, and they often will not start under load and will be damaged by
>> repeated attempts to start.
>>
>>       Bruce Gentry, KA2IVY
>>
>> On 8/14/17 11:48 AM, Sheldon Daitch via GreenKeys wrote:
>>
>>
>>
>> Three phase in US housing is probably not the norm, although I did know
>> that one home in my small hometown in Georgia was three phase and the now
>> silent key told me it was because of the central air conditioner unit for
>> the home.
>>
>> 73
>> Sheldon
>> WA4MZZ
>>
>> ------------------------------
>>
>>
>> As in VK/ZL, along with a separate earth on a 6ft copper spike.  As I
>> gaze
>> out my window, I see a pole (the pig is further down the street) with
>> three wires on top carrying 11kV (yes, really!)[*] and four wires a bit
>> further down carrying the 415v + neutral; the household drops take a
>> phase
>> in turn plus the neutral.
>>
>>
>>
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