Marantz 8b power cord replacement

Any quality 1.0 gauge wire should do I believe that is 18 AWG.

If the power cord is 16 gauge then you could buy one of these and just cut off the IEC connector.

It appears the Marantz 8B uses a 3.5 amp slow blow AC line fuse. Just a guess the full load amps of the Marantz amp is around 2.8 amps. #16 gauge copper wire is good for 10 amps.
https://www.ampslab.com/SCHEMATICS/Marantz8B.jpg

The cord has a non- polarized 2 blade plug which matches the plug on the Marantz 8Bamp and the tuner receptacle outlet.
https://www.amazon.com/Cable-Matters-2-Pack-Non-Polarized-Power/dp/B0153T1MHM?th=1

Jim

One additional source you could check with is VAC.  VAC and Kevin Hayes manufactured the Marantz reissues in the early 90’s and he could be familiar with the original specification.

Thanks for the suggestions, I’ll look for a 16ga

OK, amateur here, so those electronically oriented please advise if totally off the wall.

Can’t you simply wrap the cord with electrician’s tape? Run it length wise along the cord and wrap around?

If so, use a quality tape, it makes a difference.

jetter1,790 posts

04-30-2020
10:17am

OK, amateur here, so those electronically oriented please advise if totally off the wall.

Can’t you simply wrap the cord with electrician’s tape? Run it length wise along the cord and wrap around?

If so, use a quality tape, it makes a difference.

Depends on how bad the insulation has deteriorated. The OP said the insulation shows signs of cracking. I would also guess the insulation is also hardening and has become brittle. Just a guess it wouldn’t take much of a physical movement of the cord to open up the cracks exposing the wires. If the insulation is hard and brittle the insulation may even break off and or flake off exposing the wires.


Wrapping tape around the outside of the flat two conductor power cord would contain, by adding insulation around the outer part of the insulation of the power cord, but the tape would do nothing for the failing insulation covering of each conductor that separates the two wire from one another. And there is the problem. In the event of dead short circuit, therein the the hot and neutral wires directly solidly contact one another, hopefully that would cause the branch circuit breaker to trip open,... hopefully.

Worse case event, and more probable, the hot and neutral wires will not make a good hard contact with one another and instead the two wires will make a loose touching connection causing arcing. Arcing causes heat and arcing creates carbon, a semi conductor. Acing will not cause a standard branch circuit breaker to trip open. It takes a dead short circuit or a continued overload above the breaker handle rating to cause the breaker to trip open.

So the arcing continues and generates more heat. More heat the glue on the tape starts to melt and fails to hold the wrapped tape in place. More acing more heat the rubber or thermal plastic insulation starts burning. Before long a fire.

That is why AFCI circuit protection was created. An AFCI protects from both parallel and series arcing.
https://www.afcisafety.org/afci/what-is-afci/

Jim.

Based on jea48's excellent post above, which I requested (from the electrically oriented) probably best to ignore my idea.

Would be fine for tape or heat shrink if a minor cut but in this case the cord is old and cracked along its entire length and requires replacement as jea48 suggests. 
Will look for a 16 ga replacement. Thanks again