Re: How to EC while baby is at work with me...
Yep I second (third, fourth? ) the suggestion to keep something on his bum while at work. Keep watching for signals and take him potty, but you will have protection from accidents on the carpet. Even some absorbent training pants could work - Wee Essentials work well at containing misses, and Bright Bots actually have a waterproof layer in the wet zone.
You might also try putting down some quasi-waterproofing. Get a comfy quilt for him to play on, and underneath it put an old wool blanket from the thrift store. The combo should keep the carpet from getting wet if you have a miss, and your lo will have a soft surface to play on.
Mama to a silly 3yo and a fearless 1yo!