Written for the
Guides you can use without buying anything. Every requirement here was read in the rule or the manufacturer's instructions, and the sources are listed at the foot of each piece so you can check us.
The 10-minute pre-trip walkaround: what inspectors look at first
A circle of the truck, in the order you would actually walk it — and the handful of things that decide how the rest of your day goes.
Before you slide it back: a gas range and dryer install checklist
The install is judged on the ten minutes after the appliance is connected — and on one thing you should do before you ever pull the old one out.
What records to keep, and for how long
Four numbers worth knowing by heart — because the day somebody asks is never the day you have time to work it out.
How callbacks quietly eat your margin
A callback rarely feels expensive. That is the problem — work out what one actually costs you, with your own numbers.
Cargo securement basics for new flatbed owner-operators
How many straps, how strong they have to be, and the two checks after you roll that most new flatbedders have never been told about.
Out-of-service orders: what triggers one, and what it really costs
Three different orders, three different things that end them — and the paperwork that follows you home afterward.
Water heater swaps: venting, strapping and discharge in plain English
The four things that decide whether a replacement is done, in the order you meet them — and the one document that outranks all of them.
Where a flexible cord may not go
The cord is rated fine. It is where you ran it that fails — and whether it fails at all depends on which permitted use you are in.
The two numbers behind every offset
Multiplier and shrink are not chart values to memorize. They fall out of one triangle, and knowing where they come from is what saves the stick when the chart is in the truck.
Ohm's law, and the one it leads to
Four quantities, twelve formulas, and a single relationship underneath. The useful part is not the wheel — it is what the squared term tells you about a loose connection.
Leading and lagging, and why the meter cares
Power factor is one triangle. Which way it leans tells you whether the load is motors or capacitors, and whether you are paying for current that does no work.