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Can you explain? Why would a welder need a 4-prong? Or did you install it for something else?

No! A ground rod serves a totally different purpose than the equipment ground run with circuits. The earth has nothing to do with clearing faults and tripping breakers, this is the job of the equipment ground. The equipment ground gets its functionality from the neutral to ground bond...

I'd use a 96 watt LED wall pack. Like this one: http://www.simkar.com/wsled/Simkar%20WS%20LED%20brochure.pdf Perfect for that instant-on requirement, and a fraction of the usage of anything comparable. I've installed many of all the sizes with great success and customer satisfaction.

Mine in red:

People get WAY too hung up on the whole 15 vs 20 amp device thing. It is also WAY over-thought. The biggest thing to remember is that even a 15A duplex receptacle or GFI is TWO 15 amp receptacles on one yoke, and is still rated for 20A feed-thru. The 15A rating is for EACH of the two devices on...

Wow! Just wow. PLEASE don't post if you are going to make erroneous incorrect posts like this. It will only serve to confuse DIYers and give them the wrong info. First off, an electric range is a 120/240V appliance, NOT straight 240V. Even so, in your description, a 240V appliance/load DOES...

Nope. Not quite. Your theory on 240V is wrong with regard to ranges. The ground is/was NEVER intended to be used for the neutral. And this was NOT the cause for the 4-wire requirement.

The whole section was not quoted. It's the height of the highest breaker. Not just the main.

Why would circuit breakers need to be ADA compliant, and why would this apply in a private home???

There is no such thing as "upside down" with panels like this. Look at all the writing and labels, everything is typically written sideways, as is the emblem on the door handle. It's either top feed or bottom feed. There is nothing to suggest one way is more correct then the other.