EN 60335-2-77, and the half that is about electricity

What the standard pins down

EN 60335 is the long family that governs household and similar electrical appliances — every part of it shares a common first part, and each machine gets a part of its own. The part numbered 2-77 is the one for lawn mowers a person walks behind.

Its subject is current, not blades. It sets out how live parts are enclosed and how far they must be from anything a hand can reach. How the supply cable is anchored, so that a tug at the far end does not pull a conductor off a terminal inside the housing. What the machine must survive in the way of moisture, given that the surface it runs on is usually damp and sometimes soaked. How the motor behaves when it is stalled — a mower that meets thick grass draws hard, and the question is whether it cooks quietly or protects itself. How the switch has to behave when power is restored after a cut, because a machine that restarts by itself on a lawn is a different machine from one that does not.

It also fixes the marking. The rated voltage, the rated input, the class of protection against electric shock and the warnings that must be legible on the appliance itself are all specified here rather than in the machinery document.

What it does not promise

It does not promise the machine will cut, and it does not promise the machine will last. Those are the same two silences as on every safety document on this shelf, and they are worth repeating because a listing that prints a standard designation invites the reader to hear a quality claim.

It does not promise a power figure that means what a buyer thinks. The rated input in watts is the electricity the machine draws, not the work it does at the blade, and two mowers of identical rated input can differ substantially in what reaches the grass. This site prints the figure as the maker states it and calls it an input.

It does not promise weather resistance beyond what was tested. A mower is not a pressure washer, and an appliance that passed a defined moisture test is not an appliance that may be hosed down. What a particular manufacturer permits is in its own instructions.

And it says nothing at all about cable length, which is the single most consequential specification on a mains mower for anyone with a garden longer than the flex.

The documents it sits next to

The machinery half is the pedestrian-mower safety standard, and the two are read together: guarding and blade braking there, insulation and cable anchorage here.

The sealing figure a listing prints as an IP code comes from a third document, and the capacity printed on a battery pack from a fourth. A garden pump, which is electrical and lives outdoors too, has its own part of this same 60335 family rather than sharing this one.

Which shelves it reaches here

The mains and battery mower shelves cite it directly. So do the scarifier, sweeper and blower families, whose electric models sit under sibling parts of the same standard for the same reasons.

Where a listing on those shelves quotes only a wattage and no standard at all, the page says so. On the imported end of these aisles that silence is the rule rather than the exception, and printing it is more useful than guessing what was behind the figure.