To: | john niolon <jniolon@att.net>, shop-talk@autox.team.net |
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Subject: | Re: [Shop-talk] ohms law stuff |
From: | Donald H Locker <dhlocker@comcast.net> |
Date: | Sat, 26 Sep 2020 18:22:13 -0400 |
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Delivered-to: | mharc@autox.team.net |
Delivered-to: | shop-talk@autox.team.net |
References: | <1UWGdH2HYC.7Vj9rDIheBs.ref@johns-desktop> <1UWGdH2HYC.7Vj9rDIheBs@johns-desktop> <0327bb21-aa50-b5f0-16ed-acaf6c0cbf33@comcast.net> |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 |
I forgot to copy the list; apologies for the duplicates. donald. *Plain Text* email -- it's an accessibility issue () no proprietary attachments; no html mail /\ <https://www.georgedillon.com/web/html_email_is_evil.shtml> On 2020-09-26 6:19 p.m., Donald H Locker wrote: > 750W/12V/0.85 = 73.5A (750W is MUCH greater than 175!) > > Label says "Full Load Input Current: 76A" so I'd be strongly inclined to > size the wiring, fuses, and connectors for that current or you'll risk > overheatig the wires. > > If you really plan to only ever draw 175W, plan for about 70% > efficiency: 175/12/0.70 = 21A > > If you ever expect to operate the inverter without the engine on, plan > for the 10V battery level, so 175/10/0.70 = 25A. > > I'd plan wiring and fuse for 30A if you expect to draw 175W. Depending > on length, 10AWG would probably work, but use 8AWG if you want to be > safe. > <http://www.offroaders.com/technical/12-volt-wiring-tech-gauge-to-amps/> > has a useful table. > > Donald. > -- > *Plain Text* email -- it's an accessibility issue > () no proprietary attachments; no html mail > /\ <https://www.georgedillon.com/web/html_email_is_evil.shtml> > > On 2020-09-26 5:59 p.m., john niolon wrote: >> Pat, the fuse on the input size is 15 amp so #12 is still acceptable >> Jim, here's the specs >> > _______________________________________________ Shop-talk@autox.team.net Archive: http://www.team.net/pipermail/shop-talk http://autox.team.net/archive utox.team.net |
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