auxiliary circuit

[Chuck Griffin]

Amps vs. SAE & Metric Wire Table Recommended Maximum amperage @ 50 C, for Metric and SAE wire sizes. Go up 1 gauge for 105/125 C, Go up 1 gauge for more than 10 feet. Max Amps, DIN&VDE 0298, amps SAE Wire gauge NumberSAE Wire Areas (Min cma**)Nominal Metric Equivalent size, mm Standard DIN Sizes, ISO6722, mm 10*1815370.8231 14 1 161623361.309 17 1.5 20*1437022.081 23 2.5 25*1258333.309 30 4 34*1093435.261 38 6 45*8148108.366 52 10 61*62453813.3 70 16 77*43736021.15 92 25 106*26245033.63 112 35 14009898053.4850 160*0012510067.43 174 70 207 95 219*0000205500107.2 244 120 * Currents are extrapolated **1mm =.00155 sq in=1973circ mils ----- Original Message ---- From: Jeff Saline To: PowersHouse@... Cc: DSN_KLR650@yahoogroups.com Sent: Tuesday, January 15, 2008 8:49:31 PM Subject: Re: [DSN_KLR650] Auxiliary Circuit On Tue, 15 Jan 2008 21:55:55 -0600 "Kevin Powers" writes:

> For folks who would like to learn some basic techniques for adding > electrical farkles to a bike, from crimping and soldering to a great > write > up on installing an aux fusebox, checkout: > http://www.ironbutt .org/forum/ forum_posts. asp?TID=1759& PN=1&TPN= 1 > > You may have to register to get to the site.

<><><><><><> <> <><><><><><> <> Kevin, Thanks for sharing that site. It has some pretty good info on how to safely install electrical stuff. One point that might be missed for some is all the circuits installed are fused immediately after the battery. That is a very good precaution as an early fuse will help protect the majority of the circuit from damage. I suppose it would have been helpful if the author had included a short bit about how to choose the correct fuse rating for the circuit. Basically folks can figure it out based on the early calculations required to figure out the wire size requirements. If you are going to have a 6 amp load you'll need at least a 6 amp fuse. But maybe no need to use something as large as a 15 amp fuse unless the wiring will handle that load. I often use a fuse just larger than the expected load on my accessory sockets to help prevent me from overloading the rather small KLR650 charging system capabilities. I'd rather replace a fuse than push start or jump the bike later on because I drained the battery from using too many amps. The purpose of the fuse is you want it to blow before the insulation melts or the wiring catches on fire. : ) Choose small enough to insure that happens. I know many folks replace the stock 10 amp fuse in the KLR650 wiring system for the headlight circuit with a 15 amp fuse. And I don't remember hearing of anyone having a problem with that replacement, yet. But I'll suggest that if folks do the calculations on the entire headlight wiring system it won't handle a 15 amp load reliably. Maybe the switch contacts are the real weak link in that system. Well, thanks again for sending that link. Best, Jeff Saline ABC # 4412 South Dakota Airmarshal Airheads Beemer Club www.airheads. org The Beautiful Black Hills of South Dakota 75 R90/6, 03 KLR650, 79 R100RT [Non-text portions of this message have been removed]