"robby" wrote in message
...

I have just bought a 19 in electric lawn mower.
Nameplate ampere rating on it is 12 Amps and I am trying to decide on the
extension cord. 75 ft of cord length will be enough to take me to the
farthest point in the lawn, and I understand I am better off buying 12
gauge cord for this purpose. You get either 25 ft or 50 ft or 100 ft cords
in the market that are 12 guage.

The question is should I connect a 50 ft and 25 ft, or am I just better
off using a single 100 ft cord for this purpose. How much am I reducing
the voltage going to the lawn mower when I use a 100 ft instead of 75 ft.
If it does not matter it might be better to have a 100 ft to give myself
additional maneuvrability.



The extra 25 foot length is of no consequence. 12 gauge wire has a
resistance of about .00187 ohms per foot. Adding the extra 25 foot length
adds 50 feet of wire to the circuit, resulting in an additional voltage drop
of 1.12 volts for a 12 amp load. You will never notice any lawn mower
performance difference arising from this ~1 volt change. This additional
drop is, after all, less than 1% change.

Smarty