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08-20-2013, 08:21 PM
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Join Date: Oct 2007
Location: St-Jerome,Quebec,Canada
Posts: 1,125
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Current Limiter
Hi Joe
The more I think about it, the more I'm gonna use a current limiter.Until I read Bob's book, I had never heard of a current limiter..Nice little gadget.
I will carry at least one of each in the aircraft just in case one blows while on the road.
That is what I will use on my Main and Std By Alt ( If I'm able to install it ).
What size of ANL would you guys install on a 60 AMPS Alternator?? A 80 Amps or more ??
I've got a 40 AMPS ANL that came with the SD-20 so this one should be good.
I think I should mount them between the B Lead and the Buss Bar(same as a breaker) Am I right on this??
They're also easier to install..
I'll keep you guys posted on the results.
Thanks again
Bruno
rv4@videotron.ca
Last edited by RV-4 : 08-20-2013 at 08:36 PM.
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08-21-2013, 05:50 AM
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Join Date: Apr 2008
Location: Riley TWP MI
Posts: 3,070
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Bruno,
According to Bob Nuckolls' diagram, a 60 amp ANL should be used with a 60 amp alternator. There is no need to carry extra current limiters. If one blows, there is a major problem, like a shorted wire or alternator.
The ANL current limiters should be connected to the load side of the main battery contactor, not necessarily right next to the contactor but at either end of the heavy wire (on the engine side of the firewall) that connects to the load side of the main battery contactor. The ANL current limiters should NOT be connected to the main power bus that is located under the instrument panel. It is not desired to run another heavy wire through the instrument panel.
The purpose of the ANL current limiter is NOT to limit the alternator current because the alternator is self limiting. The purpose of the ANL is to limit battery current when there is a short circuit in either the alternator or its wiring.
Joe Gores
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09-08-2013, 08:45 PM
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Join Date: Oct 2007
Location: St-Jerome,Quebec,Canada
Posts: 1,125
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Stand By Alternator question
Hi All
I just finished the installation of my Back Up alternator today ( B&C SD-20) and once completed I did a run up to test the installation and everything appears to be working fine except for the light provided by B&C that turns ON and will flash if the alternator's load is too high.
On the back of switch ( Light ) there are two wires already soldered on and they are marked as 1 and 2 but there are no indication to know if one is power and the other one ground or whatever they are??
Anyone knows exactly what they are and exactly how to wire that switch/light??
Thank you for your help.
Bruno
rv4@videotron.ca
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09-09-2013, 08:49 PM
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Join Date: Aug 2010
Location: Wichita, KS
Posts: 1,958
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The installation documentation states that this is a midged flange 330 bulb. If this is the case, it is an incandescent bulb and therefore it doesn't matter which wire goes where.
Simply wire one lead to the 2A sense breaker/fuse and the other to the controller terminal 5 as depicted on the B&C wiring diagram.
__________________
Kurt W.
RV9A
FLYING!!!
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09-10-2013, 10:15 AM
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Join Date: Oct 2007
Location: St-Jerome,Quebec,Canada
Posts: 1,125
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Switch/light wiring
Hi Kurt
That is the way I wired it but will check again..
I did check the light prior so it should be fine
Thanks
Bruno
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09-10-2013, 03:15 PM
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Join Date: Aug 2010
Location: Wichita, KS
Posts: 1,958
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You've probably already done this, but I'll try anyway.
In order for the standby alternator to go active, the system voltage needs to drop below what your primary alternator provides. Have you removed the primary alternator from the charging system by pulling the field breaker or disconnecting the b-lead, and then starting the engine?
The yellow light won't light up until the standby alternator goes active.
__________________
Kurt W.
RV9A
FLYING!!!
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09-11-2013, 10:41 PM
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Join Date: Oct 2007
Location: St-Jerome,Quebec,Canada
Posts: 1,125
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SWITCH/LIGHT
Hi Kurt
Yes I did that by pulling the CB of the main Alternator field and checking on the Ampmeter that the stand by is pulling the load but I just don't get a light ''ON''
i'll check again first chance I get..
Thanks
Bruno
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09-18-2013, 02:25 PM
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Join Date: Oct 2007
Location: St-Jerome,Quebec,Canada
Posts: 1,125
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Switch/light
Well I rewired the switch as per the instructions and got the light to work when press to test but it still doesn't come on when the Std-By Alt takes the load ???
I have an ampmeter & a voltmeter on the a/c so I can see when the std by takes over but the light still doesn't do a thing..
Anything I may have forget,,,anyone ???
Thanks
Bruno 
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09-18-2013, 02:32 PM
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Join Date: Aug 2010
Location: Wichita, KS
Posts: 1,958
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The standard B&C light shipped with the standby alternator kits is not a press-to-test type. That leads me to believe you are using a different light?
Is it possibly an LED light that you have?
__________________
Kurt W.
RV9A
FLYING!!!
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09-20-2013, 03:31 PM
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Join Date: Oct 2007
Location: St-Jerome,Quebec,Canada
Posts: 1,125
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Light
Hi kurt
I'm using the light that came from B&C and wired it as per the instruction but it doesn 't matter what I do,it doesn't come on when the SD-20 takes over
Here's how I wired it
One wire from the light goes to the 2 Amp C/B and the other wire goes to pin 5 on the voltage regulator
Pin 3 from the regulator goes to the same c/b basically completing the circuit
I don't know what else to try except trying another C/B ???
Thank you for your suggestion so far,it helps checking things over
Bruno
Last edited by RV-4 : 09-20-2013 at 06:44 PM.
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