Bohemian Biker Blog

Tag: SAE Pole

12 Volt Accessory Cable Kit Component Polarity and Amp Ratings

by on Jun.20, 2009, under Application


12V Accessory Cable Kit

Swapped emails with the supplier of our 12 Volt Accessory Cable Kits concerning the amp ratings of the individual component cable assemblies and decided to post the results.

Considering this kit is included with the Global Solar SUNLINQ line of Portable Solar Chargers (6.5, 12, and 25 Watt), the components are meant for relatively light amperage applications…mostly…charging handheld electronics. As I’ve discussed in other posts, there are other applications for which the components of this kit are suited.  For example, coupling a 12 volt cell phone charger to a Battery Tender Quick Connect using the power port cable assembly and in some cases the 8′ extension cable.

These two components fit nicely into this application because the SAE 2 Pin on the end of the Battery Tender Quick Connect basically replicates the SAE 2 Pin on the output of one of Global’s Portable Solar Chargers.  Specifically, the protected “female” socket side of the SAE 2 Pin connector on the end of the Quick Connect is “hot” (+) positive.  Therefore, the “exposed” male pin of the SAE 2 Pin connector on the power port assembly leads to the centerpost of the power port socket…which must be “hot” (+) positive.

Now let’s look at an application in which things don’t work out similarly well.  Someone might have the idea they’d like to couple the power plug assembly to the output of their Battery Tender…such that they may insert the power port plug into the cigarette lighter socket of a vehicle of which they’d like to maintain the battery.  NO GO!  Won’t work!  Think about it…  If the protected “female” socket side of the SAE 2 Conductor Connector on the  “Battery Tender Quick Connect installed on your motorcycle’s battery is “hot” (+) positive…the “exposed” male pin on the output of your Battery Tender must be “hot” (+) positive.

Now back to out power port plug – remembering we were saying above…the SAE 2 Pin end of these components is meant to be plugged into an SAE 2 Conductor connector with a “hot” (+) positive “protected” female socket.  So, we have a “polarity” issue here to which we must pay close, careful attention.  Stop and think thing through…thoroughly…before you start coupling connectors together. 

The power port plug has an integral 2 amp fuse, so that component’s amp rating is pretty evident.  This is ample capacity for many applications – charging most handheld electronics, etc.  When you get into attempting to power something like a portable air compressor, it’s a different story.  Even a tiny air compressor may draw 7 or 8 amps, or more.  So, this power port plug would not have the rating to be used in an application such as this.  In fact, even the heavier duty power port plugs we handle (stand-alone…without SAE 2 Pin)…are fused at 5 amps…which would still be less than an application such as this might require.  Obviously, power port plugs must be available for this application…because there are miniature compressors employing them…stretched to the limit as they may be.  

What about that 12 volt power port!  It’s rated at 7 amps max.   In most cases borderline unacceptable for the air compressor application we discussed above, but providing plenty of capacity for handheld electronics.  But, think about it this way…that Battery Tender Quick Connect installed on your motorcycle battery probably has a 7.5 amp fuse.  So, the 5 piece accessory kit’s power port cable assembly fits nicely into that parameter.

Heated gloves might be OK plugged into one of these power ports…but as always…check the manufacturer’s specifications.  Obviously, stacking up multple pieces of heated clothing is going to put you over the maximum amperage rating.

Speaking of heated clothing…often employing COAX connectors…we’re prompted to talk about the “male” COAX “barrel” connector x SAE 2 Pin adaptor that comes as part of the 5 piece accessory kit.  Once again…7 amps.  So, maybe OK for gloves…but not much more.  Now this brings me to an application that I discuss in another post – using this adaptor to facilitate the maintenance of your battery via the COAX “female” heated clothing pigtail you might have installed on your motorcycle’s battery.  I cannot condone this practice, but figuring that won’t stop some…here’s the problem.  It’s the same polarity problem.  Once again, the polarity is opposite what you need to couple the SAE 2 Pin end to the output of your Battery Tender.   

But…alas…I came up with an easy fix…a “rig” of sorts.  Again, I cannot condone this practice…and for that reason…I sell the components as a “do-it-yourself” kit.  Basically, I provide you with the components to assemble what I call a “Hot Socket” Adaptor.  That is, there is continuity between the “protected” female socket at each end.  Therefore, there is a “female” socket to accept the “hot” (+) positive pin of the SAE 2 Pin connector on the output of your Battery Tender…and the respective Adaptor conduct leads to a “hot” (+) positive “protected” female socket at the other end…to accept the “exposed” male pin of the SAE 2 Pin on the COAX cable.  Now, the male COAX end of the COAX Assembly has the correct polarity…and can be coupled to the “female” COAX end of the Heated Clothing pigtail installed on your motorcycle’s battery.  This does the trick for those that wish to avoid having more than (1) pigtail dangling from their battery.

About those Battery Terminal Clamps (component of the 5 piece kit)…  Same situation…  The “exposed” male pin of the SAE 2 Pin of this assembly leads to the red handled (+) poitive alligator clamp.  Therefore, opposite of what it should be…to be coupled to your Battery Tender output SAE 2 Pin.  This assembly carries a 15 amp rating, but remember you’d still be limited by the lower amperage rating of (for example) the 8 foot extension.

This being a post covering a lot of components, topics, and issues…I will no doubt be adding to it in the future…

Please post a comment, email us at , or feel free to call us at 302-562-1706 with any questions or concerns.

Currently, our products are available through our new e-commerce website at:  

Solar Capitalist LLC is our sister company handling products such as those discussed above, as well as Portable Solar Chargers – Capitalize on the Sun’s Energy !


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SAE 2 Pin Extension Cable Assemblies

by on Apr.20, 2009, under SAE 2 Pin

SAE 2 Pin extension cables offer some flexibility by providing for distance between the power source and the load – a couple different models to meet the circumstances of various applications.  For example, the lighter model makes for easy routing “on the go”…say from your Battery Tender Quick Connect “pigtail” up into a tank bag or backpack.  Where the sturdier model might be more appropriate for applications warranting greater durability.

“Y” extension cables expand the possibilities with respect to power sources, as well as loads.  “Y” cables facilitate combining multiple power sources in “parallel” to provide more capacity.  On the other hand, they also allow you to distribute power to multiple loads.

Hopefully, that word “parallel” rang a bell from back in the day when you learned about “parallel” vs. “series” circuits.  So, here’s a little refresher for those that haven’t thought about electrical circuits for a while.

Series vs. Parallel Wiring of Power Sources

Although each battery, solar cell, panel or module has a rated voltage and amperage, they can be wired together in such a manner as to obtain varying results.

Series Circuits/Series Wiring or Connection of Power Sources

A “series circuit” is one in which the circuit components are connected “end-to-end” providing a single path for the flow of current through all the components.

Series wiring (or connection) of power sources is accomplished by connecting the (+) “positive” of one power source to the (-) “negative” of the next.

Wiring power sources in series will result in increased voltage.  When power sources are wired in series, the voltages are additive.  Power sources wired in series will provide a total voltage equal to the sum of voltages of each individual power source.

Wiring power sources in series does not result in increased amperage.  A series circuit will have the same current throughout the circuit.

Parallel Circuits/Parallel Wiring or Connection of Power Sources

A “parallel circuit” is one in which two or more circuit components are connected like rungs of a ladder, providing separate paths for current through each of the components.

Parallel wiring (or connection) of power sources is accomplished by connecting the (+) “positive” leads of the power sources together…and then (-) “negative” leads with each other.

Wiring power sources in parallel will result in increased amperage.  When power sources are wired in parallel, the currents (amperages) are additive.  Power sources wired in parallel will provide a total current (amperage) equal to the sum of currents (amperages) of each individual power source.

Wiring power sources in parallel does not result in increased voltage.  A parallel circuit will have the same voltage throughout the circuit.

So, back to the possible applications of our “Y” Extension Cable…

Basically, as I mention above…the “Y” Extension Cable would allow you to combine the power from (2) power sources.  That could be (2) batteries, (2) portable solar chargers, or a combination of the two, i.e., a portable solar charger and a battery.  The beauty of the portable solar charger and battery combination is that the battery provides energy storage, while the portable solar charger provides power generation.  There is the  benefit of the battery being there as a relatively “level” source of power (as long as the battery isn’t drawn down too low)…even while the passing of a cloud may impact the portable solar charger’s output.  Portable solar chargers usually have internal diodes to prevent the “back-flow” of power, during shading.

By-the-way, our Global SUNLINQ Portable Solar Chargers come with an SAE 2 Pin connector on the end of the output cable.  The component cable assemblies that make up the included 5 piece accessory kit, have SAE 2 Pin connector ends, as well.

SAE 2 Pin extension cables, in general…

Extension cables also provide flexibilty with respect to orientation…which can be of key importance in the case of  portable solar chargers.  The ability to not only reach positions of maximum sun exposure, but orient for maximum exposure is  critical to attaining the full power generating capability of portable solar equipment.

When it comes to maintaining the charge of a battery…on board anything from a boat, to lawn tractor, ATV, motorcycle, or anything else with a 12 volt battery…SAE 2 Pin extension cables can prove to be very handy.   They can allow you to plug the Battery Tender into a wall outlet (keeping the unit safe and secure…as well as out of the weather)…and then potentially reaching the battery…in a driveway, in a shed, etc.   Generally, we’re talking current levels of milli-amps…sometimes a little more than 1 amp…so these distances and conductor sizes aren’t an issue.

While we’re on the topic of current levels, let’s talk about wire sizes and amperage ratings.  The lightweight 8 foot extension cable that comes as part of the 5 piece accessory kit (available separately, as well), has 18 AWG conductors and is rated at 10 amps.  Basically black lampcord (along the lines of SPT-1…but not marked as such), this cable is flexible and easily routed.

The standalone 8 foot extension cable is jacketed with a black sheath, therefore of heavier weight…and not quite as flexible…but more durable.  This cord has 16 AWG conductors, but is rated at 10 amps, as well.

I’ll take up these topics with respect to the “Y” extension cable in a future post, along with a more in-depth discussion of it’s potential applications and respective current load implications.

In addition to being very careful with respect to the current loads vs. amp ratings and polarity of various cables and adaptor assemblies, it’s always a good practice to keep close tabs on charging batteries – checking connections, giving the cords a feel, often.

And…always following manufacturer’s specified procedures…including the use of safety glasses, and attention to the issue of vapors and need for proper ventilation.

Deltran not only produces a high quality Battery Tender, but provides sturdy cables, connectors and clamp assemblies.  Deltran Battery Tenders  also come with thorough instructions.  When it comes to battery maintenance equipment – it’s best to stick with an industry leader – for safety’s sake, as well as performance.  Considering both Harley-Davidson and BMW put their name on Deltran Battery Tenders, most people would no doubt agree…Deltran is the industry leader.

We welcome email at:
These products are available through our new e-commerce website at:  
Here’s a link to the page listing them:

Solar Capitalist LLC is our sister company handling products such as the cables discussed above, Deltran Battery Tenders, as well as Portable Solar Chargers – Capitalize on the Sun’s Energy !


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SAE 2 Pin, 2 Prong, 2 Pole, 2 Conductor – 12 Volt Connector

by on Apr.05, 2009, under SAE 2 Pin

SAE 2 Pin Connector

SAE 2 Pin Connector

It seems “SAE 2 Pin” is the most common “name” I’ve seen or heard given this handy connector, but I’ve also seen and heard the following (or variations of the following): SAE 2 Prong, SAE 2 Pole, SAE 2 Conductor, SAE 2 Wire…sometimes in combination with “molded”, “flat”, “trailer light”, or “trailer type” connector.

SAE 2 Pin Extension

SAE 2 Pin Extension

This is an assembly in which the SAE 2 pin connector is commonly seen – a 12″ extension often used in trailer light applications.   Note that this assembly, being a “true” extension, has the red wire leading to an exposed “male” pin at one end, and protected “female” socket at the other.  Thus, if you have an SAE 2 Pin that you want to connect to…and extend another 12″…the resulting end will have the same “pin” and “socket” arrangement you wanted to “extend”.
This brings up a key but subtle point.  As a matter of practice, if you have a set of wires coming from a source of power…such as a battery…to a SAE 2 Pin connector…the protected “female” socket will be the “hot” (+) positive side of the connector.  A good example of this is the fused “Quick Connect” provided by Deltran with their popular Battery Tenders…which is normally left installed on the battery for ease of battery charge maintenance when desired.  If the “Quick Connect” (or battery “pigtail”…as we sometimes call them) is installed correctly, the protected “female” socket will be the “hot” (+) positive side of the connector.
Think about it…you want the protection from “arcing out” on adjacent metal parts provided by that “enclosed’ socket…rather than have a “hot” exposed pin that could potentially “ground out” and “arc out” on the frame of the bike (regardless of having the tethered cap for protection while not in use).
So…the 12″ extension actually provides what you need to make an SAE 2 Pin “Junction”.  If you cut this assembly in half…you’ll have (2) SAE 2 Pin connectors…each with 6″ leads…and here’s the beauty of this…when you join these two connectors to each other…alas…the red wire leading to the male pin on one joins to the female socket of the other…with its red wire extending in the other direction…a beautiful thing.
This, my friends was one of the recognitions that gave me my start down this road – setting out to aid others in the integration and use of this useful connector.  I thought to myself, this information will be of use to other bikers in their “do-it-yourself” motorcycle accessory circuit wiring projects.  This came after, and as a result of an earlier recognition that both Deltran Battery Tenders  and many portable solar chargers use SAE 2 Pin connectors.  So this is what I’d fondly call a “Paul Harvey moment”…”and now you know the rest of the story”…sorry to hear this gentleman and famous radio personality passed March 1, 2009.
So, you might ask “why are you letting the cat out of the bag with respect to your source of these connectors with pigtail leads?”.  Well, I believe it’s a matter of “value added” – the value I add to this basic component, that is.  I work diligently at being a “search friendly” economical source of these connectors, as well as a source of information about these connectors.  I am more than happy to share what I’ve learned about this connector, and its use.  For some, it might be very easy to find a first hand source of SAE 2 Pin connectors, but for others…living in remote areas, for example…it might not be so easy.  In addition, when I package these “pigtailed” connectors, I make it a point to surprise my customers with the necessary sections of heat shrinkable tubing to aid in making neat installations.  Obviously, do-it-yourselfers could very well have this already, but generally my customers seem delighted to receive a little extra they hadn’t figured on.
I make these pigtailed connectors readily, conveniently, and economically available in 3 different forms – “power side”, “load side”, and as a “junction” assembly.  A “power side” connector being an SAE 2 Pin having the conductor with red insulation – indicating “hot” (+) positive –  leading to the protected “female” socket.  Conversely, a “load side” connector is an SAE 2 Pin which has the conductor with red insulation – “hot” (+) positive again – leading to the exposed “male” pin, as a “mate” to the above.  A “junction” is a “mating” set, including (1) “power side” and (1) “load side” pigtailed connector.
Bohemian Biker LLC makes SAE 2 Pin connectors available in another form, as well –  a higher quality form, actually.  We have an assembly manufactured here in the USA which integrates a larger bodied (lengthwise) SAE 2 Pin connector with approxiamately 11-1/2″  of Black SPT-1 Cord /2-18 AWG conductors.
Manufactured SAE 2 Pin w/cord

Manufactured SAE 2 Pin w/cord

 The larger size of this molded connector make it easier to manipulate, plus it’s sturdier.  As far as aesthetics go, being all Black is a plus, and the longer length provides some additional latitude with respect to stowing away the wire connection.  Again, I make it a point to include heat shrinkable tubing…in this case…both for the individual conductors…and for the cord (to go over the individual connections once heat shrink is applied to them) with enough to extend beyond each end of the individual areas with heat shrink applied.
Soldered joints are the ticket!  A small butane torch, solder, and a little practice will result in nice secure connections.  Depending on your specific wiring circumstances…you might need to put the wire through the tube of heat shrink beforehand, but make sure it’s far enough away not to heat it up prematurely.  The second layer of heat shrink over the whole cord provides some strain relief, as well as added protection.
Another handy aspect of this Black corded SAE 2 Pin connector is that there is no color coding.  Therefore it can be wired either way…as a “power side” or as a “load side” connector…without violating the color standard.  Although…you don’t have that color indication to keep you straight either!

We welcome email at:

The above, as well as heavier gauge products are available through our new e-commerce website at:  

Here’s a link to the 18 AWG products:

Solar Capitalist LLC is our sister company handling products such as those discussed above, Deltran Battery Tenders, as well as Portable Solar Chargers – Capitalize on the Sun’s Energy !


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