go for it!! even if you're not sure, take it. I did it, (ICC electrical inspector) When I told my boss about taking the exams, he was not even impressed or interested. I passed the exams, and later a big goverment job came, which required to be inspected day by day for 2+ hours for more than 8 months...guess who was officially qualified?
You never know, you might be selected for a nice job just by having a certificate/qualification, plus you keep your self up to date on code issues, don't underestimate this opportunity.
Regards