Elektroinstalacija prolazi oko kuće.

Elektroinstalacija means electrical installation or electrical wiring as a system in a building. It is a collective/technical noun, so even though it refers to many wires, cables, outlets, and related parts, Croatian treats it as a single thing.

It is also a feminine singular noun.

Because the subject, elektroinstalacija, is grammatically singular.

So Croatian matches the verb to the grammatical form of the noun, not to the fact that the wiring consists of many parts.

• Elektroinstalacija prolazi... = singular subject + singular verb
• If the subject were plural, the verb would be plural too.

Prolazi is the 3rd person singular present of prolaziti.

The verb prolaziti can mean things like:

• to pass
• to go through
• to run
• to go past

In this sentence, the most natural English translation is something like runs around the house or goes around the house, because we are describing the route of the electrical wiring.

Because the preposition oko meaning around takes the genitive case.

The basic form is:

• kuća = house

After oko, it becomes:

• oko kuće = around the house

So kuće here is the genitive singular form of kuća.

Here it is singular.

That can be confusing, because kuće can also be the nominative plural form of kuća in other contexts. But in this sentence, the preposition oko requires the genitive, so kuće must be genitive singular:

• kuća = house
• oko kuće = around the house

As a preposition, yes, oko normally takes the genitive.

Examples:

• oko kuće = around the house
• oko stola = around the table
• oko zgrade = around the building

Be careful, though: oko can also be a noun meaning eye, which is a completely different use.

Both can sometimes work, but prolazi is a bit more natural when describing the path or route of something like wiring, a pipe, a road, or a line.

• Elektroinstalacija prolazi oko kuće = the wiring runs around the house
• Elektroinstalacija ide oko kuće = understandable, but a little more general/plain

So prolazi sounds slightly more descriptive and technical in this context.

It usually describes a general fact or layout, not an action happening right this moment.

Croatian present tense is often used for descriptions like this:

• where something is located
• how something is arranged
• what route something takes

So here it means that the electrical installation runs around the house as part of its normal arrangement.

Usually it suggests around the house / around the structure, often along the outside or around the perimeter. But the exact interpretation depends on context.

For example, it could mean:

• around the outer part of the house
• around the building as a whole
• around the house in terms of route/planning

If you wanted to be very clear that something is inside the house, Croatian would often use a different expression, such as po kući or something more specific like duž zidova.

Yes. Croatian word order is relatively flexible.

The neutral order here is:

• Elektroinstalacija prolazi oko kuće.

But you could also say:

• Oko kuće prolazi elektroinstalacija.

That version puts more emphasis on around the house.

The meaning stays basically the same, but the focus changes slightly.

Because Croatian has no articles like English a and the.

So kuća can mean:

• a house
• the house

Context tells you which meaning is intended.

In oko kuće, English usually translates it as around the house, but Croatian does not need a separate word for the.

Yes, prolaziti is imperfective.

That matters because imperfective verbs are commonly used for:

• ongoing actions
• repeated actions
• general descriptions
• uncompleted processes

Here, the sentence is not about one completed act of passing. It is about the route or configuration of the wiring, so the imperfective verb fits naturally.

A perfective verb would not sound right for this kind of neutral structural description.