3 prong cord on a B15 - how to make sure its safe?

[pickles]

I just got a dream amp - late 60s B15NC. It has a 3 prong power cord and the prior owner assures me the death cap has been addressed. How can I make 100% sure this thing can’t shock me or my kids. It sounds absolutely amazing.

Do I need to test the socket it’s plugged into to make sure its grounded?

 

[BassmanPaul]

If you have a multimeter check the resistance between the plugs ground pin and the metal chassis of the amp. You should read a short circuit meaning the chassis is correctly grounded. Welcome to the ranks of B15 owners!

 

[DaveDeVille]

pictures or else ... well , you know the rest .

 

[pickles]

 

[agedhorse]

Always a good idea to verify that such work is properly (and safely) performed.

For the bonded chassis safety ground to be effective, it must be connected to a properly grounded power source.

 

[beans-on-toast]

View attachment 2875768

You have a very, very rare amp. Congratulations! It looks like it is in excellent condition.

I would have a tech check the amp out and to to ensure that the three conductor power cord has been properly installed. If you have an image showing the detail of how the power cord has been connected, you can post that.

An inexpensive outlet tester can be bought at Home Depot. You can use this to test that your wall outlet at home is wired correctly.

 

[pickles]

Outlet tester on the way. Any referrals for a great tube tech in sb, ventura, the conejo, or northern LA?

 

[beans-on-toast]

Outlet tester on the way. Any referrals for a great tube tech in sb, ventura, the conejo, or northern LA?

PM johnk_10 (Thousand Oaks), if he can’t help he should be able to recommend someone in your area.