That wire source
I have created a little length chart given the resistances of the medical
electrode wires posted by Mark Wehde.
>From: "Wehde, Mark B." <MBW01 at msmail2_mayo.edu>
>Subject: RE: Heating cable source
>The company is:
Chatsworth, CA 91311
>They sell wire they call Miniature Electrode Wire AS 155 Series which is
>stranded copper with a silicone rubber insulation.
>They also sell wire they call Bioflex Insulated Wire. It can have either
>clear non-hygroscopic fluorocarbon (FEP) or polyvinylchloride (PCV)
>insulation. Wire sizes range from 28 - 40 gage with nominal resistance of
>..066 to 1.08 ohms / foot for copper wire ...
24V 50W=30W=12W 100W=56W=25W 12V 12V
Part # Gage ohms/ft 30W 24V 18V 12V 24V 18V 12V 30W 50W
1.3A 2A 1.7A 1A 4A 3.4A 2A 2.8A 4A
-----req'd cable length in feet----------------
AS155-32 32 .170 28 17
AS155-33 33 .218 26 22 13
AS155-34 34 .272 42 21 17
AS155-36 36 .436 44 26 13 11
??? 40 1.08 18 11 5.3
(The steel wire has too high of a resistance; deleted)
Looks like the best bet for constructing 24-volt cables is 40-gauge (30W),
36-38 gauge (50W), and 34-gauge (100W), scaling appropriately down
for lower voltages. My sister lives a few blocks away from this address,
so perhaps if they're not into shipping I might get her to go pick something
up personally for me.
Erik D. Olson E-mail-o-meter:
olson at phys_washington.edu it's back up!