Folks -lets end the breakers for KPA1500thread to relieve list overload for our
other readers.
Thread closed.
73,
Eric
Moderator from time to time..
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Ok... I can’t stand it any longer.
The breaker you install has nothing whatsoever to do with the equipment your
going to use on that circuit. The breaker is chosen for the size of the wire
you run in the walls. PERIOD!!!
The amp is protected by the fuses in the amp! Not the circuit
Ladies and Gentlemen,
As a *Recovering Regulator* and a person who contacted my insurance
company when I was contemplating finishing my basement, let me share a
couple thoughts/experiences.
A couple of years ago I called my home owners insurance company, USAA, and
told the nice young lady who
Code generally says 12 amps max on a 15 amp circuit.
On 7/10/2018 11:42 AM, Don Wilhelm wrote:
Think about what you normally plug into a 120 volt 15 amp receptacle -
does it always draw 15 amps? Certainly a hair dryer might, but your
cellphone charger does not.
John,
Just because the Specification says 20 amps, that is the maximum current
draw for the amp - it does not say that the breaker must be 20 amps,
only that it must be 20 amps or higher.
A 30 amp breaker is fine if the wire is #10 or larger.
Think about what you normally plug into a 120
Per the manual 50% efficiency. So at 1500 watts output the. input would be abt
3Kw. A 20 amp ckt at 240 V would supply 4.8 Kw. Seems reasonable to have
adequate power for other equipment.
Bob, K4TAX
Sent from my iPhone
> On Jul 10, 2018, at 12:34 PM, "j...@kk9a.com" wrote:
>
> I based
I based that statement on the 20amp KPA1500 rating shown on page 28 of
their manual. Obviously this is incorrect or it is very inefficient, but
still a station can have multiple heavy duty rotators, computers, multiple
transceivers, etc.
On 7/10/2018 9:13 AM, j...@kk9a.com wrote:
Yes you can run three conductor
Romex and have a 120v and 240v outlet but I do not see this as a good plan
as it could easily exceed 20 amps on one leg. Upgrading to higher amperage
circuit and you'll exceed the amperage rating for a standard 120v
On 7/10/2018 7:10 AM, N2TK, Tony wrote:
> I did not in any way suggest using the ground wire for current. But
> many appliances such as the KPA1500, air compressors, water heater,
> etc. are 220VAC devices that only require 2 wires plus ground. If
> you look at the plugs on many of these type
Let's put this in monetary terms. 100 ft of 12/2 with ground is $56 at Home
Depot. 100 ft of 10/3 with ground is $138.
If you pay an electrician to do the work, the difference won't be 10% of
the bill.
If you do it yourself, following code and getting it signed off by an
electrician and
Don,
Yes, good point.
73,
Erik K7TV
-Original Message-
From: Don Wilhelm
Sent: Tuesday, July 10, 2018 8:56 AM
To: Erik Basilier ; Elecraft@mailman.qth.net
Subject: Re: [Elecraft] Breakers for KPA1500?
Erik,
One of the benefits of using a new and direct line to the breaker box to power
Neither Tony or I suggested making a 120v circuit from the two wire 240v
line using the ground as the neutral. Yes you can run three conductor
Romex and have a 120v and 240v outlet but I do not see this as a good plan
as it could easily exceed 20 amps on one leg. Upgrading to higher amperage
Erik,
One of the benefits of using a new and direct line to the breaker box to
power both 240 and 120 in the shack is that the 120 volt (and the 240
volt) green wire ground is a straight run to the breaker box instead of
being run willy-nilly from receptacle to receptacle through the house.
It is abundantly clear that 3 conductors plus protective ground are needed
if there will be any load, on the same circuit, that requires 120V as
opposed to 240V only. I certainly agree 100%. It is also clear that the
person who installs 240V for the PA only could get away with one conductor
less.
Message-
From: Don Wilhelm [mailto:donw...@embarqmail.com]
Sent: Tuesday, July 10, 2018 9:54 AM
To: N2TK, Tony ; j...@audiosystemsgroup.com;
elecraft@mailman.qth.net
Subject: Re: [Elecraft] Breakers for KPA1500?
Tony,
While it is possible and safe to use only two wires plug safety ground
: Re: [Elecraft] Breakers for KPA1500?
Tony,
While it is possible and safe to use only two wires plug safety ground (Green
Wire Ground) for a 240 volt receptacle or 240 volt only device (in-home air
conditioner, dryer, etc), it is quite unsafe to split off for a 120 volt supply
using one hot
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim Brown
Sent: Monday, July 09, 2018 8:40 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Breakers for KPA1500?
On 7/9/2018 12:26 PM, Bob McGraw K4TAX wrote:
I would also
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim Brown
Sent: Monday, July 09, 2018 8:40 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Breakers for KPA1500?
On 7/9/2018 12:26 PM, Bob McGraw K4TAX wrote:
I would also
I concur, I used Romex which had 2 conductors plus a ground. Perhaps he
meant that the ground wire should be the same size as the two conductors
but I am not sure how much control you have over this using standard
cable. While adding this circuit I also ran a dedicated 120v outlet for
the radio
-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim Brown
Sent: Monday, July 09, 2018 8:40 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Breakers for KPA1500?
On 7/9/2018 12:26 PM, Bob McGraw K4TAX wrote:
> I would also suggest using th
On 7/9/2018 6:23 PM, Rick WA6NHC wrote:
> The only factor after that is the insurance company, which may choose to
> EXCEED the existing code(s) which directly affects the pocketbook.
In my grad school days, I was a mentor to a HS kid whose dad was an
insurance company safety engineer in the
While I certainly would recommend conservative design, so long as it’s a
KPA-1500 you’re powering don’t worry so much.You won’t be running continuous
duty cycle, so the heating of the wire is of less concern.
It would be a bigger concern if the circuit was used on a continuous duty cycle
load
uly 09, 2018 8:27 PM
> To: hawley, charles j jr
> Cc: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] Breakers for KPA1500?
>
> Actually, if you look at the NEC (National Electrical Code), they have
> factors for ambient temp and wire temp ratings. Other codes around the
> worl
@mailman.qth.net
Subject: Re: [Elecraft] Breakers for KPA1500?
Actually, if you look at the NEC (National Electrical Code), they have
factors for ambient temp and wire temp ratings. Other codes around the
world are similar.
For example, if you use AWG 12 Type UF cable, the base rating is 20 Amps
Again, it's law only to the extent that the county (a) has adopted it,
(b) that it's remotely current (no pun intended) and (c) there are
permits with inspections after the install.
None of that exists here, I presume it's similar in other counties as
well. The only factor after that is the
For the 240 volt service to my operating position, I have a total run of
75 ft from the breaker panel to the amp outlet. I installed #10 - 3
w/ground with a dual 20A breaker in the panel. Even though most of the
run is in the attic, 90ºC rating is adequate in as much as it is not in
On 7/9/2018 12:26 PM, Bob McGraw K4TAX wrote:
I would also suggest using three - #10 with ground as the line from
the breakers to the amp operating position.
Not only a suggestion -- it's the law! Electrical Codes carry the force
of law, and they require that the equipment ground must 1)
On 7/9/2018 11:29 AM, Josh Fiden wrote:
I take what code requires as the minimum wire gauge. For shorter runs it's
fine. But measure the run length, multiply by 2 (two wires) and calculate IR
voltage drop.
Actually, the voltage drop is greater than you calculate with the simple
formula
Actually, if you look at the NEC (National Electrical Code), they have
factors for ambient temp and wire temp ratings. Other codes around the
world are similar.
For example, if you use AWG 12 Type UF cable, the base rating is 20 Amps.
With the temperatures we have in Arizona, where it can get
How many watts of heat does the average attic have in the summertime?
Chuck
KE9UW
Sent from my iPhone, cjack
> On Jul 9, 2018, at 6:39 PM, Josh Fiden wrote:
>
> If wire run ends up being 50' you could see a 2V drop at 13A. Agree that
> switching supply in amp won't care. 26W of heat in the
If wire run ends up being 50' you could see a 2V drop at 13A. Agree that
switching supply in amp won't care. 26W of heat in the wire inside a wall would
bug me.
73
Josh W6XU
Sent from my mobile device
> On Jul 9, 2018, at 3:12 PM, Roy Koeppe wrote:
>
> The KPA1500 uses a regulated power
The KPA1500 uses a regulated power supply: input 195 to 250 vac. Voltage
loss in #12 wires is so small the regulator will laugh at that.
73, Roy K6XK
"I would also suggest using three - #10 with ground as the line from the
breakers to the amp operating position."
73
Bob, K4TAX
On
>>
>> Ted, KN1CBR
>>
>>
>> --
>> Message: 17
>> Date: Mon, 9 Jul 2018 09:24:02 -0700 (PDT)
>> From: Hisashi T Fujinaka
>> To: Elecraft Mailing List
>> Subject: [Elecraft]
.
Ted, KN1CBR
--
Message: 17
Date: Mon, 9 Jul 2018 09:24:02 -0700 (PDT)
From: Hisashi T Fujinaka
To: Elecraft Mailing List
Subject: [Elecraft] Breakers for KPA1500?
Message-ID:
Content-Type: text/plain; charset=US-ASCII
I would also suggest using three - #10 with ground as the line from the
breakers to the amp operating position.
73
Bob, K4TAX
On 7/9/2018 11:43 AM, Roy Koeppe wrote:
Yes, that is what I am using.
73, Roy K6XK
I probably missed this but my google searches aren't working either.
Actually, 20 amp breakers will work fine.
Use #12 wire and it will handle 20 amps. If the run is long, use #10
wire to reduce the voltage drop.
Elecraft recommends plugging into 195 to 250 VAC 50/60 Hz up to 20A.
73,
Don W3FPR
I probably missed this but my google searches aren't working
I take what code requires as the minimum wire gauge. For shorter runs it's
fine. But measure the run length, multiply by 2 (two wires) and calculate IR
voltage drop. It's not a big expense when you're installing to use 10 instead
of 12 awg if it would make a noticeable difference.
Seems like
sufficient.
Ted, KN1CBR
--
Message: 17
Date: Mon, 9 Jul 2018 09:24:02 -0700 (PDT)
From: Hisashi T Fujinaka
To: Elecraft Mailing List
Subject: [Elecraft] Breakers for KPA1500?
Message-ID:
Content-Type: text/plain; charset=US-ASCII
Yes, that is what I am using.
73, Roy K6XK
I probably missed this but my google searches aren't working either.
Will 2x 20A breakers (220v) be sufficient for the KPA1500?
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To the breaker box? It's new construction from the breaker box to the
amp.
On Mon, 9 Jul 2018, Nr4c wrote:
What is the house circuit wire size used.
I think the breaker protects the house from fire due to overheated wiring.
Sent from my iPhone
...nr4c. bill
On Jul 9, 2018, at 12:24 PM,
What is the house circuit wire size used.
I think the breaker protects the house from fire due to overheated wiring.
Sent from my iPhone
...nr4c. bill
> On Jul 9, 2018, at 12:24 PM, Hisashi T Fujinaka wrote:
>
> I probably missed this but my google searches aren't working either.
>
> Will
I probably missed this but my google searches aren't working either.
Will 2x 20A breakers (220v) be sufficient for the KPA1500?
Thanks.
--
Hisashi T Fujinaka - ht...@twofifty.com K7EMI
BSEE + BSChem + BAEnglish + MSCS + $2.50 = coffee
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