Most SMAW electrodes use DCEP if they are welding with direct current.
Al
I usually try to follow the recommendations based upon the filler metal classification. I have varied from that over the years and have used cellulose sodium (xx10) electrode on DCEN for root passes.
Though this is not indicated in the AWS Specification for this electrode, it does not mean it cannot happen.
I have never filled a joint with DCSP using SMAW. Some electrodes are "intended" to be used on DCSP so it would not be an issue.
By Jim Hughes 
Date 10-30-2019 12:53
Edited 10-30-2019 15:12
HeeWee Jiann,
It really depends on the electrode. For example E6011, E6013 can be used with both DCEN and DCEP. What electrode are you welding with?
