CARACAS (Reuters) - President Nicolas Maduro's adversaries are to stage a two-day national strike from Wednesday in a final push to pressure him into abandoning a weekend election for a super-congress they say will institutionalize autocracy in Venezuela.

Millions participated in a 24-hour shutdown last week, leaving businesses closed, families behind doors, and streets barricaded or empty across swathes of Venezuela.

"From 6 a.m. tomorrow, we are going to paralyze this country," opposition lawmaker and street activist Juan Requesens said. "We have shown Nicolas Maduro and his group there is no love for them anywhere in Venezuela or the world."

The opposition, which has majority support after years in the shadow of the Socialist Party during the rule of Maduro's predecessor Hugo Chavez, says Maduro's planned Constituent Assembly is a farce designed purely to keep him in power.

The 54-year-old president, who calls himself "the son of Chavez" and flag bearer of his "21st century socialism" project, insists Sunday's vote will go ahead despite intense pressure at home and abroad including a threat of U.S. economic sanctions.

Maduro says the election for the 545-seat assembly, which will have power to rewrite the national constitution and override the current opposition-led legislature, is designed to put power in the hands or ordinary people.

"We are going to decide between war and peace, the future or the past, the sovereign power of the people or the imperialist, oligarchical coup," he told supporters late on Tuesday of the vote, which the opposition is boycotting.

Anti-government protesters fire a rudimentary mortar at the police during riots in Caracas. Carlos Garcia Rawlins/REUTERS

Deaths

State enterprises, including oil company PDVSA that accounts for 95 percent of Venezuela's export income, were to stay open on Wednesday. Some public employees - who number 2.8 million in total - said they had strict orders not to skip work.

Five people died during last week's strike as National Guard troops seeking to dismantle blockades fired teargas and rubber bullets at masked youths hurling stones and Molotov cocktails.

That took to over 100 the number killed since protests against Maduro began in early April.

But in some areas, such as rural zones and the working-class neighborhoods of Caracas where the ruling Chavismo movement has traditionally had its power-base, life carried on relatively normally during the one-day shutdown.

Demonstrators stand next to a bus burns near a protest against Venezuela's President Nicolas Maduro's government in Caracas, Venezuela. Reuters/Christian Veron

Many Venezuelans, regardless of their political view, were fretting about the impact of further disruptions on their wallets - and stomachs. The OPEC nation is immersed in a brutal economic crisis, with shortages of basic foods and medicines.

"I'm out all day every day trying to find work or waiting in line for food," said casual builder Juan Manuel Fernandez, 58, who lives on a hilltop slum in Caracas with six dependents and relies on scarce, state-subsidized products for meals.

"So for me and my family, a strike means going hungry, so how can I be happy with that?" Fernandez added, saying Maduro should abandon the "crazy" Constituent Assembly but the opposition should avoid causing extra hardship for the poor.

(Additional reporting by Diego Ore and Fabian Cambero; Editing by Phil Berlowitz)