IS 14:30 hours the same as 14:30:00

Hi  maxlulu-ga,

This is just a free comment, not an "answer" to your question.

Since you have posted this under the category "relationships and society > law"
are you asking about a specific/theoretical practical situation?
To make up an example:  a contract calls for delivery of documents or
payment by 14.30 on a certain date?

14:30:00 certainly makes the time more precise, like adding decimal
points to a number, and with the use of radio clocks, such precision
can be an accepted standard, i.e., clarifying that  - in my example - 
delivery within the minute after 14:30 is no longer acceptable,
although the hour and minute time still shows "14:30".

It would help if you could explain the context of your question.
Let us know.

Myoarin

I'm not sure if this is what you were wondering, but in 24
hour/military time 2:30 PM would be expressed as 1430 hours.  Your
second example would (IMHO)indicate an elapsed time of 14 hours 30
minutes 0 seconds.