You can definitely consider Electrical Maintenance as a vocational subject while applying for MHTCET. According to the eligibility criteria, vocational subjects can be considered along with Physics and Maths for calculating the aggregate marks.

In your case, since you have Electrical Maintenance as a vocational subject, you can add it to your Physics and Maths scores to meet the grouping criteria. However, please note that the specific guidelines for vocational subjects may vary, so it's always best to check the official MHTCET website to confirm the details.

Additionally, keep in mind that having a vocational subject like Electrical Maintenance can actually boost your chances of getting a good college, as it's considered a valuable skill.