It was determined that a "caution" sign was implied permission to "proceed with caution" so, instead, we chose to use "Stay Back! STOP" signs.
The signs are made of very strong, durable plastic, and fold up flat.
Fits over the rung of your inspection ladder. Perfect for when you pull the service panel cover.
Be sure you keep your purchase receipt that comes with the sign to prove that you own and utilize this consumer-safety product.